JEE Main & Advanced Chemistry Equilibrium / साम्यावस्था Question Bank

done Acids and Bases Total Questions - 165

• question_answer1)
  Which of the following is not a Lewis acid              [MP PET 2002]
  A)
                  CO          done clear
  B)
                  \[SiC{{l}_{4}}\] done clear
  C)
                  \[S{{O}_{3}}\]    done clear
  D)
                  \[Z{{n}^{2+}}\] done clear
  View Solution play_arrow

• question_answer2)
  Review the equilibrium and choose the correct statement \[HCl{{O}_{4}}+{{H}_{2}}O\] ⇄ \[{{H}_{3}}{{O}^{+}}+ClO_{4}^{-}\]           [RPMT 2000]
  A)
                  \[HCl{{O}_{4}}\] is the conjugate acid of \[{{H}_{2}}O\] done clear
  B)
                  \[{{H}_{3}}{{O}^{+}}\] is the conjugate base of \[{{H}_{2}}O\] done clear
  C)
                  \[{{H}_{2}}O\] is the conjugate acid of \[{{H}_{3}}{{O}^{+}}\] done clear
  D)
                  \[ClO_{4}^{-}\] is the conjugate base of \[HCl{{O}_{4}}\] done clear
  View Solution play_arrow

• question_answer3)
  A solution of \[FeC{{l}_{3}}\] in water acts as acidic due to [BVP 2003]
  A)
                  Hydrolysis of \[F{{e}^{3+}}\]       done clear
  B)
                  Acidic impurities done clear
  C)
                  Dissociation        done clear
  D)
                  Ionisation done clear
  View Solution play_arrow

• question_answer4)
  A white substance having alkaline nature in solution is [BVP 2003]
  A)
                  \[NaN{{O}_{3}}\]             done clear
  B)
                  \[N{{H}_{4}}Cl\] done clear
  C)
                  \[N{{a}_{2}}C{{O}_{3}}\]               done clear
  D)
                  \[F{{e}_{2}}{{O}_{3}}\] done clear
  View Solution play_arrow

• question_answer5)
  Which of the following can act both as Bronsted acid and Bronsted base                [MP PET 1995; MP PET/PMT 1998]
  A)
                  \[C{{l}^{-}}\]       done clear
  B)
                  \[HCO_{3}^{-}\] done clear
  C)
                  \[{{H}_{3}}{{O}^{+}}\]    done clear
  D)
                  \[O{{H}^{-}}\] done clear
  View Solution play_arrow

• question_answer6)
  Lewis acid            [MP PMT 1987]
  A)
                  Presence of H atom is necessary done clear
  B)
                  Is a electron pair donor done clear
  C)
                  Always a proton donor done clear
  D)
                  Is a electron pair acceptor done clear
  View Solution play_arrow

• question_answer7)
  For two acids A and \[B,\,\,p{{K}_{a}}=1.2,\,\,p{{K}_{b}}=2.8\] respectively in value, then which is true  [Bihar MEE 1998]
  A)
                  A and B both are equally acidic done clear
  B)
                  A is stronger than B done clear
  C)
                  B is stronger than A done clear
  D)
                  Neither A nor B is strong done clear
  E)
                  None of these done clear
  View Solution play_arrow

• question_answer8)
  Aq. solution of sodium cyanide is              [BHU 1981]
  A)
                  Acidic    done clear
  B)
                  Amphoteric done clear
  C)
                  Basic      done clear
  D)
                  Netural done clear
  View Solution play_arrow

• question_answer9)
  Which of the following is the strongest conjugate base [MADT Bihar 1983; CBSE PMT 1999; KCET (Med.) 2001]
  A)
                  \[C{{l}^{-}}\]       done clear
  B)
                  \[C{{H}_{3}}CO{{O}^{-}}\] done clear
  C)
                  \[S{{O}_{4}}^{--}\]           done clear
  D)
                  \[N{{O}_{2}}^{-}\] done clear
  View Solution play_arrow

• question_answer10)
  \[NaOH\] is a strong base because           [AIIMS 2001]
  A)
                  It gives \[O{{H}^{-}}\]ion              done clear
  B)
                  It can be oxidised done clear
  C)
                  It can be easily ionised   done clear
  D)
                  Both A and C done clear
  View Solution play_arrow

• question_answer11)
  Which one of the following can be classified as a Bronsted base                                                 [KCET 2001]
  A)
                  \[NO_{3}^{-}\]  done clear
  B)
                  \[{{H}_{3}}{{O}^{+}}\] done clear
  C)
                  \[NH_{4}^{+}\] done clear
  D)
                  \[C{{H}_{3}}COOH\] done clear
  View Solution play_arrow

• question_answer12)
  Which one of the following substance has the highest proton affinity                                     [AIEEE 2003]
  A)
                  \[{{H}_{2}}O\]   done clear
  B)
                  \[{{H}_{2}}S\] done clear
  C)
                  \[N{{H}_{3}}\]   done clear
  D)
                  \[P{{H}_{3}}\] done clear
  View Solution play_arrow

• question_answer13)
  Which of the following is the strongest Lewis acid [EAMCET 1998]
  A)
                  \[B{{I}_{3}}\]      done clear
  B)
                  \[BB{{r}_{3}}\] done clear
  C)
                  \[BC{{l}_{3}}\]   done clear
  D)
                  \[B{{F}_{3}}\] done clear
  View Solution play_arrow

• question_answer14)
  An aqueous solution of ammonia consists of [MP PET 2001]
  A)
                  \[{{H}^{+}}\]      done clear
  B)
                  \[O{{H}^{-}}\] done clear
  C)
                  \[NH_{4}^{+}\] done clear
  D)
                  \[NH_{4}^{+}\] and \[O{{H}^{-}}\] done clear
  View Solution play_arrow

• question_answer15)
  Which of the following is not a Lewis acid [CBSE PMT 1996]
  A)
                  \[B{{F}_{3}}\]     done clear
  B)
                  \[FeC{{l}_{3}}\] done clear
  C)
                  \[Si{{F}_{4}}\]    done clear
  D)
                  \[{{C}_{2}}{{H}_{4}}\] done clear
  View Solution play_arrow

• question_answer16)
  The conjugate base of \[N{{H}_{2}}^{-}\]is           [EAMCET 1998]
  A)
                  \[N{{H}_{3}}\]   done clear
  B)
                  \[N{{H}^{2-}}\] done clear
  C)
                  \[NH_{4}^{+}\] done clear
  D)
                  \[{{N}_{3}}^{-}\] done clear
  View Solution play_arrow

• question_answer17)
  The strength of an acid depends on its tendency to [MP PET 1996]
  A)
                  Accept protons done clear
  B)
                  Donate protons done clear
  C)
                  Accept electrons              done clear
  D)
                  Donate electrons done clear
  View Solution play_arrow

• question_answer18)
  Which is not a electrophile           [RPET 1999]
  A)
                  \[AlC{{l}_{3}}\]  done clear
  B)
                  \[B{{F}_{3}}\] done clear
  C)
                  \[{{(C{{H}_{3}})}_{3}}{{C}^{+}}\]                done clear
  D)
                  \[N{{H}_{3}}\] done clear
  View Solution play_arrow

• question_answer19)
  Ammonia gas dissolves in water to give \[N{{H}_{4}}OH.\] In this reaction water acts as                 [CPMT 1990; MP PMT 1990]
  A)
                  An acid                 done clear
  B)
                  A base done clear
  C)
                  A salt     done clear
  D)
                  A conjugate base done clear
  View Solution play_arrow

• question_answer20)
  In the equilibrium                 \[C{{H}_{3}}COOH+HF\]⇄ \[C{{H}_{3}}COO{{H}_{2}}^{+}+{{F}^{-}}\]       [BHU 1987]
  A)
                  \[{{F}^{-}}\]is the conjugate acid of \[C{{H}_{3}}COOH\] done clear
  B)
                  \[{{F}^{-}}\]is the conjugate base of \[HF\] done clear
  C)
                  \[C{{H}_{3}}COOH\] is the conjugate acid of \[C{{H}_{3}}COO{{H}_{2}}^{+}\] done clear
  D)
                  \[C{{H}_{3}}COO{{H}_{2}}^{+}\] is the conjugate base of \[C{{H}_{3}}COOH\] done clear
  View Solution play_arrow

• question_answer21)
  The compound that is not a Lewis acid is               [IIT 1985]
  A)
                  \[HSO_{4}^{-}\]                done clear
  B)
                  \[AlC{{l}_{3}}\] done clear
  C)
                  \[BeC{{l}_{2}}\] done clear
  D)
                  \[N{{H}_{3}}\] done clear
  View Solution play_arrow

• question_answer22)
  Which of the following dissolves in water to give a neutral solution          [Bihar MADT 1980]
  A)
                  \[{{(N{{H}_{4}})}_{2}}S{{O}_{4}}\]            done clear
  B)
                  \[Ba{{(N{{O}_{3}})}_{2}}\] done clear
  C)
                  \[CrC{{l}_{3}}\]  done clear
  D)
                  \[CuS{{O}_{4}}\] done clear
  View Solution play_arrow

• question_answer23)
  Which of the following is the strongest acid         [AMU 1982]
  A)
                  \[{{H}_{3}}P{{O}_{4}}\]  done clear
  B)
                  \[{{H}_{2}}S{{O}_{4}}\] done clear
  C)
                  \[HN{{O}_{2}}\]                done clear
  D)
                  \[C{{H}_{3}}COOH\] done clear
  View Solution play_arrow

• question_answer24)
  An example of a Lewis acid is [MADT Bihar 1982; AMU 1982; MNR 1994; RPMT 1997; KCET 2000; Orissa JEE 2005]
  A)
                  \[NaCl\]               done clear
  B)
                  \[{{25}^{o}}C\] done clear
  C)
                  \[AlC{{l}_{3}}\]  done clear
  D)
                  \[SnC{{l}_{4}}\] done clear
  View Solution play_arrow

• question_answer25)
  In the equilibrium HClO4+H2O ⇌ H2O++\[ClO_{4}^{-}\] [BHU 1981, 86]
  A)
                  \[HCl{{O}_{4}}\] is the conjugate acid of \[{{H}_{2}}O\] done clear
  B)
                  \[{{H}_{2}}O\] is the conjugate acid of \[{{H}_{3}}{{O}^{+}}\] done clear
  C)
                  \[{{H}_{3}}{{O}^{+}}\]is the conjugate base of \[{{H}_{2}}O\] done clear
  D)
                  \[ClO_{4}^{-}\] is the conjugate base of \[HCl{{O}_{4}}\] done clear
  View Solution play_arrow

• question_answer26)
  Which of the following would be expected to form ionic solution in water            [CPMT 1976; Kurukshetra CEE 1998]
  A)
                  \[CC{{l}_{4}}\]   done clear
  B)
                  \[{{O}_{2}}\] done clear
  C)
                  \[NaBr\]               done clear
  D)
                  \[CHB{{r}_{3}}\] done clear
  View Solution play_arrow

• question_answer27)
  A solution of sodium bicarbonate in water turns [NCERT 1971]
  A)
                  Phenolphthalein pink     done clear
  B)
                  Methyl orange yellow done clear
  C)
                  Methyl orange red          done clear
  D)
                  Blue litmus red done clear
  View Solution play_arrow

• question_answer28)
  Accepting the definition that an acid is a proton donor, the acid in the following reaction \[N{{H}_{3}}+{{H}_{2}}O\to NH_{4}^{+}+O{{H}^{-}}\] is          [Kerala (Med.) 2003]
  A)
                  \[N{{H}_{3}}\]   done clear
  B)
                  \[{{H}^{+}}\] done clear
  C)
                  \[NH_{4}^{+}\] done clear
  D)
                  \[{{H}_{2}}O\] done clear
  View Solution play_arrow

• question_answer29)
  With reference to protonic acids, which of the following statements is correct    [CPMT 1990]
  A)
                  \[P{{H}_{3}}\]is more basic than \[N{{H}_{3}}\] done clear
  B)
                  \[P{{H}_{3}}\]is less basic than \[N{{H}_{3}}\] done clear
  C)
                  \[P{{H}_{3}}\]is equally basic as \[N{{H}_{3}}\] done clear
  D)
                  \[P{{H}_{3}}\]is amphoteric while \[N{{H}_{3}}\] is basic done clear
  View Solution play_arrow

• question_answer30)
  \[N{{H}_{4}}OH\] is weak base because                [CPMT 1979]
  A)
                  It has low vapour pressure done clear
  B)
                  It is only slightly ionized done clear
  C)
                  It is not a hydroxide of metal done clear
  D)
                  It has low density done clear
  View Solution play_arrow

• question_answer31)
  \[HN{{O}_{3}}\]in liquid hydrogen fluoride behaves
  A)
                  As an acid done clear
  B)
                  As a base done clear
  C)
                  Neither as a base nor as an acid done clear
  D)
                  As a base and as an acid done clear
  View Solution play_arrow

• question_answer32)
  Aqueous solution of \[CuS{{O}_{4}}.5{{H}_{2}}O\] changes blue litmus paper to red due to          [CPMT 1979; MP PMT 1989]
  A)
                  Presence of \[C{{u}^{++}}\] ions done clear
  B)
                  Presence of \[S{{O}_{4}}^{--}\] ions done clear
  C)
                  Hydrolysis taking place done clear
  D)
                  Reduction taking place done clear
  View Solution play_arrow

• question_answer33)
  In the following reaction                 \[H{{C}_{2}}{{O}_{4}}^{-}+P{{O}_{4}}^{---}\] ⇄ \[HP{{O}_{4}}^{--}+{{C}_{2}}{{O}_{4}}^{--}\]                 Which are the two Bronsted bases          [MP PMT 1991]
  A)
                  \[0.1\,M\,HCN\] and \[P{{O}_{4}}^{---}\]              done clear
  B)
                  \[HP{{O}_{4}}^{--}\] and \[{{C}_{2}}{{O}_{4}}^{--}\] done clear
  C)
                  \[N{{H}_{4}}Cl\] and \[P{{O}_{4}}^{---}\]               done clear
  D)
                  \[P{{O}_{4}}^{---}\] and \[pH\] done clear
  View Solution play_arrow

• question_answer34)
  Which of the following is the weakest acid           [CPMT 2001]
  A)
                  HF           done clear
  B)
                  HCl done clear
  C)
                  HBr         done clear
  D)
                  HI done clear
  View Solution play_arrow

• question_answer35)
  The degree of dissociation in a weak electrolyte increases  [CBSE PMT 1989; MP PMT 1997]
  A)
                  On increasing dilution    done clear
  B)
                  On increasing pressure done clear
  C)
                  On  decreasing dilution done clear
  D)
                  None of these done clear
  View Solution play_arrow

• question_answer36)
  \[{{H}^{+}}\] is a                                               [MADT Bihar 1983]
  A)
                  Lewis acid            done clear
  B)
                  Lewis base done clear
  C)
                  Bronsted-Lowry base     done clear
  D)
                  None of the above done clear
  View Solution play_arrow

• question_answer37)
  Dissociation of \[{{H}_{3}}P{{O}_{4}}\]takes place in following steps [CPMT 1976; NCERT 1987]
  A)
                  1              done clear
  B)
                  2 done clear
  C)
                  3              done clear
  D)
                  4 done clear
  View Solution play_arrow

• question_answer38)
  The aqueous solution of disodium hydrogen phosphate is [MADT Bihar 1982]
  A)
                  Acidic    done clear
  B)
                  Neutral done clear
  C)
                  Basic      done clear
  D)
                  None done clear
  View Solution play_arrow

• question_answer39)
  Which of the following is a conjugated acid-base pair [MADT Bihar 1984; DPMT 2001]
  A)
                  \[HCl,\,\,NaOH\]              done clear
  B)
                  \[N{{H}_{4}}Cl,\,\,N{{H}_{4}}OH\] done clear
  C)
                  \[{{H}_{2}}S{{O}_{4}},\,\,HS{{O}_{4}}^{-}\]           done clear
  D)
                  \[KCN,\,\,HCN\] done clear
  View Solution play_arrow

• question_answer40)
  The solution of strong acid and weak base \[N{{H}_{4}}Cl\]is [MADT Bihar 1981; CPMT 1979, 83, 84]
  A)
                  Acidic    done clear
  B)
                  Basic done clear
  C)
                  Neutral done clear
  D)
                  None of the above done clear
  View Solution play_arrow

• question_answer41)
  The conjugate acid of \[HPO_{3}^{2-}\]is              [EAMCET 1989]
  A)
                  \[{{H}_{3}}P{{O}_{4}}\]  done clear
  B)
                  \[{{H}_{3}}P{{O}_{3}}\] done clear
  C)
                  \[{{H}_{2}}PO_{3}^{-}\] done clear
  D)
                  \[PO_{4}^{3-}\] done clear
  View Solution play_arrow

• question_answer42)
  What name is given to the reaction between hydrogen ion and hydroxyl ion       [MP PMT 1990]
  A)
                  Hydrogenation  done clear
  B)
                  Hydroxylation done clear
  C)
                  Hydrolysis           done clear
  D)
                  Neutralization done clear
  View Solution play_arrow

• question_answer43)
  Among the following, the weakest Lewis base is [NCERT 1981]
  A)
                  \[{{H}^{-}}\]       done clear
  B)
                  \[O{{H}^{-}}\] done clear
  C)
                  \[C{{l}^{-}}\]       done clear
  D)
                  \[HCO_{3}^{-}\] done clear
  View Solution play_arrow

• question_answer44)
  The \[pKa\]for acid A is greater than \[pKa\] for acid B. The strong acid is                                              [DPMT 2000]
  A)
                  Acid B    done clear
  B)
                  Acid A done clear
  C)
                  Both A and B      done clear
  D)
                  Neither A nor B done clear
  View Solution play_arrow

• question_answer45)
  The conjugate acid of \[NH_{2}^{-}\]is   [IIT 1985; Roorkee 1995; EAMCET 1997;CBSE PMT PMT 2000; MP PET 1996,2000]
  A)
                  \[N{{H}_{3}}\]   done clear
  B)
                  \[NH_{4}^{+}\] done clear
  C)
                  \[N{{H}_{2}}OH\]             done clear
  D)
                  \[{{N}_{2}}{{H}_{4}}\] done clear
  View Solution play_arrow

• question_answer46)
  Correct statement is       [CPMT 1985]
  A)
                  \[N{{H}_{4}}Cl\]gives alkaline solution in water done clear
  B)
                  \[C{{H}_{3}}COONa\] gives acidic solution in water done clear
  C)
                  \[C{{H}_{3}}COOH\] is a weak acid done clear
  D)
                  \[N{{H}_{4}}OH\] is a strong base done clear
  View Solution play_arrow

• question_answer47)
  \[p{{K}_{a}}\] of a weak acid is defined as            [JIPMER 1999]
  A)
                  log\[_{10}{{K}_{a}}\]      done clear
  B)
                  \[\frac{1}{lo{{g}_{10}}{{K}_{a}}}\] done clear
  C)
                  log \[_{10}\frac{1}{{{K}_{a}}}\]   done clear
  D)
                  ?log \[_{10}\frac{1}{{{K}_{a}}}\] done clear
  View Solution play_arrow

• question_answer48)
  A salt \['X'\] is dissolved in water \[(pH=7),\] the resulting solution becomes alkaline in nature. The salt is made of [CPMT 1983]
  A)
                  A strong acid and strong base done clear
  B)
                  A strong acid and weak base done clear
  C)
                  A weak acid and weak base done clear
  D)
                  A weak acid and strong base done clear
  View Solution play_arrow

• question_answer49)
  Which one is not an acid salt       [MNR 1984]
  A)
                  \[Na{{H}_{2}}P{{O}_{2}}\]            done clear
  B)
                  \[Na{{H}_{2}}P{{O}_{3}}\] done clear
  C)
                  \[Na{{H}_{2}}P{{O}_{4}}\]            done clear
  D)
                  None done clear
  View Solution play_arrow

• question_answer50)
  A white substance was alkaline in solution. Which of the following substances could it be              [CPMT 1989]
  A)
                  \[F{{e}_{2}}{{O}_{3}}\]  done clear
  B)
                  \[N{{a}_{2}}C{{O}_{3}}\] done clear
  C)
                  \[N{{H}_{4}}Cl\]                done clear
  D)
                  \[NaN{{O}_{3}}\] done clear
  View Solution play_arrow

• question_answer51)
  An aqueous solution of ammonium carbonate is [MP PMT 1989]
  A)
                  Weakly acidic     done clear
  B)
                  Weakly basic done clear
  C)
                  Strongly acidic   done clear
  D)
                  Neither acidic nor basic done clear
  View Solution play_arrow

• question_answer52)
  \[100\,\,ml\]of \[0.2\,\,M\,\,{{H}_{2}}S{{O}_{4}}\] is added to \[100\,\,ml\] of \[0.2\,\,M\,\,NaOH.\] The resulting solution will be   [BHU 1996]
  A)
                  Acidic    done clear
  B)
                  Basic done clear
  C)
                  Neutral done clear
  D)
                  Slightly basic done clear
  View Solution play_arrow

• question_answer53)
  \[{{H}_{3}}B{{O}_{3}}\] is                                              [IIT Screening 2003]
  A)
                  Monobasic and weak Lewis acid done clear
  B)
                  Monobasic and weak Bronsted acid  done clear
  C)
                  Monobasic and strong Lewis acid done clear
  D)
                  Tribasic and weak Bronsted acid done clear
  View Solution play_arrow

• question_answer54)
  In the reaction \[SnC{{l}_{2}}+2C{{l}^{-}}\to SnC{{l}_{4}},\] Lewis acid is [EAMCET 1987]
  A)
                  \[SnC{{l}_{2}}\] done clear
  B)
                  \[C{{l}^{-}}\] done clear
  C)
                  \[SnC{{l}_{4}}\] done clear
  D)
                  None of these done clear
  View Solution play_arrow

• question_answer55)
  Lewis base is      [RPMT 1997]
  A)
                  \[C{{O}_{2}}\]    done clear
  B)
                  \[S{{O}_{3}}\] done clear
  C)
                  \[S{{O}_{2}}\]    done clear
  D)
                  \[ROH\] done clear
  View Solution play_arrow

• question_answer56)
  \[1\times {{10}^{-12}}\] of \[1\,\,M\,\,{{H}_{2}}S{{O}_{4}}\] will completely neutralise
  A)
                  \[10\,\,ml\] of \[1\,\,M\,\,NaOH\] solution done clear
  B)
                  \[10\,\,ml\] of \[2\,\,M\,\,NaOH\] solution done clear
  C)
                  \[5\,\,ml\] of \[2\,\,M\,\,KOH\] solution done clear
  D)
                  \[5\,\,ml\] of \[1\,\,M\,\,N{{a}_{2}}C{{O}_{3}}\] solution done clear
  View Solution play_arrow

• question_answer57)
  Which of the following compounds are diprotic [Pb. PMT 2000]
  A)
                  \[{{H}_{2}}P{{O}_{5}}\]  done clear
  B)
                  \[{{H}_{2}}S\] done clear
  C)
                  \[HCl{{O}_{3}}\]                done clear
  D)
                  \[{{H}_{3}}P{{O}_{3}}\] done clear
  View Solution play_arrow

• question_answer58)
  When 100 ml of 1M \[NaOH\] solution is mixed with 10 ml of 10 M \[{{H}_{2}}S{{O}_{4}},\] the resulting mixture will be [AMU 2002]
  A)
                  Acidic    done clear
  B)
                  Alkaline done clear
  C)
                  Neutral done clear
  D)
                  Strongly alkaline done clear
  View Solution play_arrow

• question_answer59)
  The \[pH\]indicators are               [KCET 1996]
  A)
                  Salts of strong acids and strong bases done clear
  B)
                  Salts of weak acids and weak bases done clear
  C)
                  Either weak acids or weak bases done clear
  D)
                  Either strong acids or strong bases done clear
  View Solution play_arrow

• question_answer60)
  Which of the following is not Lewis acid [BHU 1997]
  A)
                  \[B{{F}_{3}}\]     done clear
  B)
                  \[AlC{{l}_{3}}\] done clear
  C)
                  \[FeC{{l}_{3}}\] done clear
  D)
                  \[P{{H}_{3}}\] done clear
  View Solution play_arrow

• question_answer61)
  A solution of sodium acetate in water will             [MNR 1979]
  A)
                  Turn red litmus blue       done clear
  B)
                  Turn blue litmus red done clear
  C)
                  Not effect litmus              done clear
  D)
                  Decolorizes litmus done clear
  View Solution play_arrow

• question_answer62)
  \[C{{l}^{-}}\]is the conjugate base of [NCERT 1979; CPMT 1976; MP PET/PMT 1988]
  A)
                  \[HCl{{O}_{4}}\]                done clear
  B)
                  \[1\times {{10}^{-5}},\] done clear
  C)
                  \[C{{H}_{3}}COONa\]     done clear
  D)
                  \[HCl{{O}_{3}}\] done clear
  View Solution play_arrow

• question_answer63)
  Which of the following behaves as both Lewis and Bronsted base                                             [MP PMT 2003]
  A)
                  \[B{{F}_{3}}\]     done clear
  B)
                  \[C{{l}^{-}}\] done clear
  C)
                  \[CO\]   done clear
  D)
                  None of these done clear
  View Solution play_arrow

• question_answer64)
  The conjugate acid of a strong base is a [EAMCET 1979]
  A)
                  Strong acid          done clear
  B)
                  Weak acid done clear
  C)
                  Strong base        done clear
  D)
                  Weak base done clear
  View Solution play_arrow

• question_answer65)
  Which one is the weakest acid   [DPMT 2002]
  A)
                  \[HN{{O}_{3}}\]                done clear
  B)
                  \[HCl{{O}_{4}}\] done clear
  C)
                  \[{{H}_{2}}S{{O}_{4}}\]  done clear
  D)
                  \[HBr\] done clear
  View Solution play_arrow

• question_answer66)
  Conjugate base of \[HPO_{4}^{2-}\] is   [MP PMT 1995]
  A)
                  \[PO_{4}^{3-}\]                done clear
  B)
                  \[{{H}_{2}}PO_{4}^{-}\] done clear
  C)
                  \[{{H}_{3}}P{{O}_{4}}\]  done clear
  D)
                  \[{{H}_{4}}P{{O}_{3}}\] done clear
  View Solution play_arrow

• question_answer67)
  Which of the following is not Lewis acid                 [RPET/PMT 2002]
  A)
                  \[FeC{{l}_{3}}\] done clear
  B)
                  \[AlC{{l}_{3}}\] done clear
  C)
                  \[BC{{l}_{3}}\]   done clear
  D)
                  \[N{{H}_{3}}\] done clear
  View Solution play_arrow

• question_answer68)
  (i) A strong acid has a weak conjugate base                 (ii) An acid is an electron pair acceptor                 The above statements (i) and (ii)
  A)
                  Correct done clear
  B)
                  Wrong done clear
  C)
                  (i) Correct and (ii) Wrong done clear
  D)
                  (i) Wrong and (ii) Correct done clear
  View Solution play_arrow

• question_answer69)
  The pH is less than 7, of the solution of [Pb. PMT 2002; MP PMT 2003]
  A)
                  \[FeC{{l}_{3}}\] done clear
  B)
                  \[NaCN\] done clear
  C)
                  \[NaOH\]             done clear
  D)
                  \[NaCl\] done clear
  View Solution play_arrow

• question_answer70)
  In the reaction \[{{I}_{2}}+{{I}^{-}}\to \,{{I}_{3}}^{-},\] the Lewis base is [CPMT 1997; RPMT 2002; BCECE 2005]
  A)
                  \[{{I}_{2}}\]        done clear
  B)
                  \[{{I}^{-}}\]                 done clear
  C)
                  \[{{I}_{3}}^{-}\] done clear
  D)
                  None of these done clear
  View Solution play_arrow

• question_answer71)
  The strength of an acid depends on its tendency to  [UPSEAT 2001]
  A)
                  Accept protons                 done clear
  B)
                  Donate protons  done clear
  C)
                  Accept electrons              done clear
  D)
                  Donate electrons done clear
  View Solution play_arrow

• question_answer72)
  In Lewis acid-base theory, neutralization reaction may be considered as                [NCERT 1977]
  A)
                  Formation of salt and water done clear
  B)
                  Competition for protons by acid and base done clear
  C)
                  Oxidation reduction done clear
  D)
                  Coordinate covalent bond formation done clear
  View Solution play_arrow

• question_answer73)
  The salt that forms neutral solution in water is [EAMCET 1981]
  A)
                  \[N{{H}_{4}}Cl\]                done clear
  B)
                  \[NaCl\] done clear
  C)
                  \[N{{a}_{2}}C{{O}_{3}}\]               done clear
  D)
                  \[{{K}_{3}}B{{O}_{3}}\] done clear
  View Solution play_arrow

• question_answer74)
  Which of the following cannot act as a Lewis or Bronsted acid                                     [DCE 2001]
  A)
                  \[B{{F}_{3}}\]     done clear
  B)
                  \[AlC{{l}_{3}}\] done clear
  C)
                  \[SnC{{l}_{4}}\] done clear
  D)
                  \[CC{{l}_{4}}\] done clear
  View Solution play_arrow

• question_answer75)
  Which one of the following salts gives an acidic solution in water                                               [MP PET 2002]
  A)
                  \[C{{H}_{3}}COONa\]     done clear
  B)
                  \[N{{H}_{4}}Cl\] done clear
  C)
                  \[NaCl\]               done clear
  D)
                  \[C{{H}_{3}}COON{{H}_{4}}\] done clear
  View Solution play_arrow

• question_answer76)
  Which of the anhydrous salts when come in contact with water turns blue           [AMU 1981, 82]
  A)
                  Ferrous sulphate              done clear
  B)
                  Copper sulphate done clear
  C)
                  Zinc sulphate     done clear
  D)
                  Cobalt sulphate done clear
  View Solution play_arrow

• question_answer77)
  The species among the following, which can act as an acid and a base is                 [AIEEE 2002; KCET 2005]
  A)
                  \[HSO_{4}^{-}\]                done clear
  B)
                  \[SO_{4}^{2-}\] done clear
  C)
                  \[{{H}_{3}}{{O}^{+}}\]    done clear
  D)
                  \[C{{l}^{-}}\] done clear
  View Solution play_arrow

• question_answer78)
  The strongest base from the following species is [KCET 1996]
  A)
                  \[N{{H}^{2-}}\]  done clear
  B)
                  \[O{{H}^{-}}\] done clear
  C)
                  \[{{O}^{2-}}\]     done clear
  D)
                  \[{{S}^{2-}}\] done clear
  View Solution play_arrow

• question_answer79)
  Which one is Lewis acid [CPMT 1997]
  A)
                  \[C{{l}^{-}}\]       done clear
  B)
                  \[A{{g}^{+}}\] done clear
  C)
                  \[{{C}_{2}}{{H}_{5}}OH\]               done clear
  D)
                  \[{{S}^{2-}}\] done clear
  View Solution play_arrow

• question_answer80)
  The conjugate acid of \[{{H}_{2}}PO_{4}^{-}\] is                [MP PET 1990]
  A)
                  \[{{H}_{3}}P{{O}_{4}}\]  done clear
  B)
                  \[{{H}_{2}}PO_{4}^{-}\] done clear
  C)
                  \[PO_{4}^{3-}\]                done clear
  D)
                  \[{{H}_{3}}{{O}^{+}}\] done clear
  View Solution play_arrow

• question_answer81)
  The conjugate acid of \[{{S}_{2}}O_{8}^{2-}\] is [EAMCET 1984]
  A)
                  \[{{H}_{2}}{{S}_{2}}{{O}_{8}}\]   done clear
  B)
                  \[{{H}_{2}}S{{O}_{4}}\] done clear
  C)
                  \[HSO_{4}^{-}\]                done clear
  D)
                  \[H{{S}_{2}}O_{8}^{-}\] done clear
  View Solution play_arrow

• question_answer82)
  In the reaction \[BC{{l}_{3}}+P{{H}_{3}}\,\to \,C{{l}_{3}}B-P{{H}_{3}},\] Lewis base is [EAMCET 1986]
  A)
                  \[BC{{l}_{3}}\]   done clear
  B)
                  \[P{{H}_{3}}\] done clear
  C)
                  \[C{{l}_{3}}B-P{{H}_{3}}\]             done clear
  D)
                  None of these done clear
  View Solution play_arrow

• question_answer83)
  Which of the following statement is true              [MP PMT 1996]
  A)
                  The conjugate base of a strong acid is a strong base done clear
  B)
                  The conjugate base of a weak acid is a strong base done clear
  C)
                  The conjugate base of a weak acid is a weak base done clear
  D)
                  The base and its conjugate acid react to form a neutral solution done clear
  View Solution play_arrow

• question_answer84)
  What is the conjugate base of \[O{{H}^{-}}\]       [AIEEE 2005]
  A)
                  \[{{O}_{2}}\]      done clear
  B)
                  \[{{H}_{2}}O\] done clear
  C)
                  \[{{O}^{-}}\]       done clear
  D)
                  \[{{O}^{2-}}\] done clear
  View Solution play_arrow

• question_answer85)
  Which of the following is a Lewis base    [BHU 1995]
  A)
                  \[C{{H}_{4}}\]    done clear
  B)
                  \[{{C}_{2}}{{H}_{5}}OH\] done clear
  C)
                  Acetone               done clear
  D)
                  Secondary amine done clear
  View Solution play_arrow

• question_answer86)
  The correct order of acid strength is        [CBSE PMT 2005]
  A)
                  \[HClO<HCl{{O}_{2}}<HCl{{O}_{3}}<HCl{{O}_{4}}\] done clear
  B)
                  \[HCl{{O}_{4}}<HClO<HCl{{O}_{2}}<HCl{{O}_{3}}\] done clear
  C)
                  \[HCl{{O}_{2}}<HCl{{O}_{3}}<HCl{{O}_{4}}<HClO\] done clear
  D)
                  \[HCl{{O}_{4}}<HCl{{O}_{3}}<HCl{{O}_{2}}\]\[<HClO\] done clear
  View Solution play_arrow

• question_answer87)
  The strongest acid is       [DPMT 2000]
  A)
                  \[{{H}_{3}}As{{O}_{4}}\]               done clear
  B)
                  \[{{H}_{3}}As{{O}_{3}}\] done clear
  C)
                  \[{{H}_{3}}P{{O}_{3}}\]  done clear
  D)
                  \[{{H}_{3}}P{{O}_{4}}\] done clear
  View Solution play_arrow

• question_answer88)
  Which of the following is the strongest base       [Roorkee 2000]
  A)
                  \[{{C}_{2}}H_{5}^{-}\]    done clear
  B)
                  \[{{C}_{2}}{{H}_{5}}CO{{O}^{-}}\] done clear
  C)
                  \[{{C}_{2}}{{H}_{5}}{{O}^{-}}\]   done clear
  D)
                  \[O{{H}^{-}}\] done clear
  View Solution play_arrow

• question_answer89)
  The aqueous solution of which one of the following is basic [MP PMT 2001]
  A)
                  \[HOCl\]               done clear
  B)
                  \[NaHS{{O}_{4}}\] done clear
  C)
                  \[N{{H}_{4}}N{{O}_{3}}\]              done clear
  D)
                  \[NaOCl\] done clear
  View Solution play_arrow

• question_answer90)
  Which of the following is the weakest base         [IIT 1980]
  A)
                  \[NaOH\]             done clear
  B)
                  \[Ca\,{{(OH)}_{2}}\] done clear
  C)
                  \[N{{H}_{4}}OH\]             done clear
  D)
                  \[KOH\] done clear
  View Solution play_arrow

• question_answer91)
  The suitable indicator for strong acid and weak base is [RPMT 1997; UPSEAT 2002]
  A)
                  Methyl orange  done clear
  B)
                  Methyl red done clear
  C)
                  Phenol red          done clear
  D)
                  Phenolphthalein done clear
  View Solution play_arrow

• question_answer92)
  Among the following acids, the weakest one is [NCERT 1984]
  A)
                  \[HF\]   done clear
  B)
                  \[HCl\] done clear
  C)
                  \[HBr\] done clear
  D)
                  \[HI\] done clear
  View Solution play_arrow

• question_answer93)
  The compound HCl behaves as ?. in the reaction, \[HCl+HF\to H_{2}^{+}Cl+{{F}^{-}}\]   [JIPMER 2001]
  A)
                  Weak base          done clear
  B)
                  Weak acid done clear
  C)
                  Strong base        done clear
  D)
                  Strong acid done clear
  View Solution play_arrow

• question_answer94)
  The conjugate base of a strong acid is a [EAMCET 1978]
  A)
                  Strong base        done clear
  B)
                  Strong acid done clear
  C)
                  Weak acid           done clear
  D)
                  Weak base done clear
  View Solution play_arrow

• question_answer95)
  Which among the following is strongest acid       [BHU 2005]
  A)
                  H(ClO)O2              done clear
  B)
                  H(ClO)O3 done clear
  C)
                  H(ClO)O               done clear
  D)
                  H(ClO) done clear
  View Solution play_arrow

• question_answer96)
  In the reaction \[2{{H}_{2}}O\]⇄\[{{H}_{3}}{{O}^{+}}+O{{H}^{-}}\],  water is [MP PET 1989]
  A)
                  A weak base done clear
  B)
                  A weak acid done clear
  C)
                  Both a weak acid and a weak base done clear
  D)
                  Neither an acid nor a base done clear
  View Solution play_arrow

• question_answer97)
  In the reaction \[HCl+{{H}_{2}}O\]⇌ \[{{H}_{3}}{{O}^{+}}+C{{l}^{-}}\] [NCERT 1978; EAMCET 1982, 89]
  A)
                  \[{{H}_{2}}O\] is the conjugate base of \[HCl\] acid done clear
  B)
                  \[C{{l}^{-}}\]is the conjugate base of \[HCl\]acid done clear
  C)
                  \[C{{l}^{-}}\]is the conjugate acid of \[{{H}_{2}}O\] base done clear
  D)
                  \[{{H}_{3}}{{O}^{+}}\]is the conjugate base of \[HCl\] done clear
  View Solution play_arrow

• question_answer98)
  According to Lewis concept, an acid is a substance which [EAMCET 1981; NCERT 1981;  CPMT 1986; MP PMT 1987]
  A)
                  Accepts protons done clear
  B)
                  Donates protons done clear
  C)
                  Accepts a lone pair of electrons done clear
  D)
                  Donates a lone pair of electrons done clear
  View Solution play_arrow

• question_answer99)
  Water is a            [KCET 2002]
  A)
                  Amphoteric acid               done clear
  B)
                  Aprotic solvent done clear
  C)
                  Protophobic solvent       done clear
  D)
                  None of these done clear
  View Solution play_arrow

• question_answer100)
  Conjugate base of \[N{{H}_{3}}\] is         [RPMT 2002]
  A)
                  \[NH_{4}^{\oplus }\]      done clear
  B)
                  \[NH_{2}^{\oplus }\] done clear
  C)
                  \[NH_{2}^{\Theta }\]     done clear
  D)
                  \[{{N}_{2}}\] done clear
  View Solution play_arrow

• question_answer101)
  Which of the following species is an acid and also a conjugate base of another acid           [NCERT 1981]
  A)
                  \[HSO_{4}^{-}\]                done clear
  B)
                  \[{{H}_{2}}S{{O}_{4}}\] done clear
  C)
                  \[O{{H}^{-}}\]    done clear
  D)
                  \[{{H}_{3}}{{O}^{+}}\] done clear
  View Solution play_arrow

• question_answer102)
  Which of the following is Lewis acid [NCERT 1978; EAMCET 1987; MP PET 1994; CPMT 1990; AFMC 1997; RPMT 1999]
  A)
                  \[B{{F}_{3}}\]     done clear
  B)
                  \[C{{l}^{-}}\] done clear
  C)
                  \[{{H}_{2}}O\]   done clear
  D)
                  \[N{{H}_{3}}\] done clear
  View Solution play_arrow

• question_answer103)
  According to Bronsted-Lowry concept, base is a substance which is          [NCERT 1982; RPMT 1997 AFMC 1999]
  A)
                  A proton donor done clear
  B)
                  An electron pair acceptor done clear
  C)
                  A proton acceptor done clear
  D)
                  An electron pair donor done clear
  View Solution play_arrow

• question_answer104)
  Which of the following is known as hydronium ion [NCERT 1976]
  A)
                  \[{{H}^{+}}\]      done clear
  B)
                  \[{{H}_{2}}{{O}^{+}}\] done clear
  C)
                  \[{{H}_{3}}{{O}^{+}}\]    done clear
  D)
                  \[{{H}_{2}}O_{2}^{+}\] done clear
  View Solution play_arrow

• question_answer105)
  An aqueous solution of aluminium sulphate would show [NCERT 1977]
  A)
                  An acidic reaction done clear
  B)
                  A neutral reaction done clear
  C)
                  A basic reaction done clear
  D)
                  Both acidic and basic reaction done clear
  View Solution play_arrow

• question_answer106)
  The aqueous solution of aluminium chloride is acidic due to [MNR 1986, 88]
  A)
                  Cation hydrolysis done clear
  B)
                  Anion hydrolysis done clear
  C)
                  Hydrolysis of both anion and cation done clear
  D)
                  Dissociation done clear
  View Solution play_arrow

• question_answer107)
  \[HSO_{4}^{-}\] is the conjugate base of               [NCERT 1977]
  A)
                  \[{{H}^{+}}\]      done clear
  B)
                  \[{{H}_{2}}S{{O}_{3}}\] done clear
  C)
                  \[SO_{4}^{2-}\] done clear
  D)
                  \[{{H}_{2}}S{{O}_{4}}\] done clear
  View Solution play_arrow

• question_answer108)
  An acid is a compound which furnishes (Bronsted-Lowry concept)            [EAMCET 1975]
  A)
                  An electron        done clear
  B)
                  A proton done clear
  C)
                  An electron and a proton             done clear
  D)
                  None of the above done clear
  View Solution play_arrow

• question_answer109)
  The conjugate base of sulphuric acid is [EAMCET 1974]
  A)
                  Sodium hydroxide           done clear
  B)
                  Hydrochloric acid done clear
  C)
                  Bisulphate ion   done clear
  D)
                  Barium hydroxide done clear
  View Solution play_arrow

• question_answer110)
  Which is strongest Lewis base    [CPMT 1994]
  A)
                  \[Sb{{H}_{3}}\]  done clear
  B)
                  \[As{{H}_{3}}\] done clear
  C)
                  \[P{{H}_{3}}\]    done clear
  D)
                  \[N{{H}_{3}}\] done clear
  View Solution play_arrow

• question_answer111)
  According to Bronsted principle, an aqueous solution of \[HN{{O}_{3}}\] will contain       [MP PMT/PET 1988]
  A)
                  \[NO_{2}^{-}\]  done clear
  B)
                  \[NO_{3}^{-}\] done clear
  C)
                  \[NO_{2}^{+}\] done clear
  D)
                  \[N{{O}^{+}}\] done clear
  View Solution play_arrow

• question_answer112)
  Aqueous solution of an acid is characterised by the presence of [NCERT 1977]
  A)
                  \[{{H}^{+}}\]ions              done clear
  B)
                  \[H_{2}^{+}\]ions done clear
  C)
                  \[{{H}_{3}}{{O}^{+}}\]ions            done clear
  D)
                  \[{{H}_{4}}{{O}^{+}}\]ions done clear
  View Solution play_arrow

• question_answer113)
  Ammonium ion is             [RPMT 1999; KCET 2002]
  A)
                  Neither an acid nor base               done clear
  B)
                  Both an acid and a base done clear
  C)
                  A conjugate acid               done clear
  D)
                  A conjugate base done clear
  View Solution play_arrow

• question_answer114)
  Aqueous solution of \[AlC{{l}_{3}}\] is    [RPMT 2002]
  A)
                  Acidic    done clear
  B)
                  Basic done clear
  C)
                  Amphoteric        done clear
  D)
                  None of these done clear
  View Solution play_arrow

• question_answer115)
  The species which acts as a Lewis acid but not a Bronsted acid is                [MP PMT 1999; Kurukshetra CET 2002]
  A)
                  \[NH_{2}^{-}\]  done clear
  B)
                  \[{{O}^{2-}}\] done clear
  C)
                  \[B{{F}_{3}}\]     done clear
  D)
                  \[O{{H}^{-}}\] done clear
  View Solution play_arrow

• question_answer116)
  Among the following, the weakest base is           [MP PMT 2002]
  A)
                  \[{{H}^{-}}\]       done clear
  B)
                  \[CH_{3}^{-}\] done clear
  C)
                  \[C{{H}_{3}}{{O}^{-}}\]  done clear
  D)
                  \[C{{l}^{-}}\] done clear
  View Solution play_arrow

• question_answer117)
  Which of the following is not lewis base  [EAMCET 1975; RPMT 2002]
  A)
                  \[N{{H}_{3}}\]   done clear
  B)
                  \[P{{H}_{3}}\] done clear
  C)
                  \[{{(C{{H}_{3}})}_{3}}N\]              done clear
  D)
                  \[H{{N}_{3}}\] done clear
  View Solution play_arrow

• question_answer118)
  \[p{{K}_{a}}\]value of the strongest acid among the following is [MP PMT 1990]
  A)
                  3.0          done clear
  B)
                  4.5          done clear
  C)
                  1.0          done clear
  D)
                  2.0 done clear
  View Solution play_arrow

• question_answer119)
  The most acidic compound in water is    [CBSE PMT 2001]
  A)
                  \[AlC{{l}_{3}}\]  done clear
  B)
                  \[BeC{{l}_{2}}\] done clear
  C)
                  \[FeC{{l}_{3}}\] done clear
  D)
                  None of these done clear
  View Solution play_arrow

• question_answer120)
  \[B{{F}_{3}}\] is used as a catalyst in several industrial processes due to its                                           [Kerala (Med.) 2002]
  A)
                  Strong reducing agent done clear
  B)
                  Weak reducing agent done clear
  C)
                  Strong Lewis acid nature done clear
  D)
                  Weak Lewis acid character done clear
  View Solution play_arrow

• question_answer121)
  The aqueous solution of \[AlC{{l}_{3}}\] is acidic due to the hydrolysis of                                               [UPSEAT 2001, 02]
  A)
                  Aluminium ion done clear
  B)
                  Chloride ion done clear
  C)
                  Both aluminium and chloride ion done clear
  D)
                  None of these done clear
  View Solution play_arrow

• question_answer122)
  Which shows weak ionisation in water   [MH CET 2001]
  A)
                  \[{{H}_{2}}S{{O}_{4}}\]  done clear
  B)
                  \[NaCl\] done clear
  C)
                  \[HN{{O}_{3}}\]                done clear
  D)
                  \[N{{H}_{3}}\] done clear
  View Solution play_arrow

• question_answer123)
  An organic dye, cosine used to detect end point of precipitation titration by adsorption is called  [MH CET 1999]
  A)
                  Absorption indicator       done clear
  B)
                  Adsorption indicator done clear
  C)
                  Chemical indicator           done clear
  D)
                  None of these done clear
  View Solution play_arrow

• question_answer124)
  The indicator used in the titration of iodine against sodium thiosulphate is            [AFMC 2002]
  A)
                  Starch   done clear
  B)
                  \[{{K}_{3}}Fe{{(CN)}_{6}}\] done clear
  C)
                  \[{{K}_{2}}Cr{{O}_{4}}\]                done clear
  D)
                  Potassium done clear
  View Solution play_arrow

• question_answer125)
  Phenolphthalein does not act as an indicator for the titration between                                                  [Pb. PMT 2002]
  A)
                  \[NaOH\] and \[C{{H}_{3}}COOH\] done clear
  B)
                  \[{{H}_{2}}{{C}_{2}}{{O}_{4}}\] and \[KMn{{O}_{4}}\] done clear
  C)
                  \[Ba{{(OH)}_{2}}\] and \[HCl\] done clear
  D)
                  \[KOH\]and \[{{H}_{2}}S{{O}_{4}}\] done clear
  View Solution play_arrow

• question_answer126)
  Which is not example of Bronsted Lowry theory [AIEEE 2003]
  A)
                  \[AlC{{l}_{3}}\]  done clear
  B)
                  \[{{H}_{2}}S{{O}_{4}}\] done clear
  C)
                  \[S{{O}_{2}}\]    done clear
  D)
                  \[HN{{O}_{3}}\] done clear
  View Solution play_arrow

• question_answer127)
  An aqueous solution of sodium carbonate is alkaline because sodium carbonate is a salt of           [MP PET 2002]
  A)
                  Weak acid and weak base done clear
  B)
                  Strong acid and weak base done clear
  C)
                  Weak acid and strong base done clear
  D)
                  Strong acid and strong base done clear
  View Solution play_arrow

• question_answer128)
  The acid that results when a base accepts a proton is called         [Kerala (Med.) 2002]
  A)
                  Conjugate base of the acid done clear
  B)
                  Conjugate protonated base done clear
  C)
                  Lewis base done clear
  D)
                  Conjugate acid of the base done clear
  E)
                  None of these done clear
  View Solution play_arrow

• question_answer129)
  Ammonia gas dissolves in water to form \[N{{H}_{4}}OH\]. In this reaction water acts as                [KCET (Engg./Med.) 1999]
  A)
                  A conjugate base             done clear
  B)
                  A non-polar solvent done clear
  C)
                  An acid done clear
  D)
                  A base done clear
  View Solution play_arrow

• question_answer130)
  The conjugate base in the following reaction                 \[{{H}_{2}}S{{O}_{4}}+{{H}_{2}}O\] ⇄ \[{{H}_{3}}{{O}^{+}}+HSO_{4}^{-}\]            [DCE 1999]
  A)
                  \[{{H}_{2}}O\]   done clear
  B)
                  \[HSO_{4}^{-}\] done clear
  C)
                  \[{{H}_{3}}{{O}^{+}}\]    done clear
  D)
                  \[S{{O}_{2}}\] done clear
  View Solution play_arrow

• question_answer131)
  An aqueous solution of aluminium sulphate shows  [DPMT 2001]
  A)
                  A basic nature done clear
  B)
                  An acidic nature  done clear
  C)
                  A neutral nature done clear
  D)
                  Both acidic and basic nature done clear
  View Solution play_arrow

• question_answer132)
  Neutralization of an acid with a base invariably results in the production of                                           [CPMT 1983]
  A)
                  \[{{H}_{3}}{{O}^{+}}\]    done clear
  B)
                  \[O{{H}^{-}}\] done clear
  C)
                  \[{{H}_{2}}O\]   done clear
  D)
                  \[{{H}^{+}}\] and \[O{{H}^{-}}\] done clear
  View Solution play_arrow

• question_answer133)
  The conjugate acid of \[HPO_{4}^{2-}\]is [MP PMT 1987, 90, 91; EAMCET 1993]
  A)
                  \[{{H}_{2}}PO_{4}^{-}\] done clear
  B)
                  \[PO_{4}^{3-}\] done clear
  C)
                  \[{{H}_{3}}P{{O}_{4}}\]  done clear
  D)
                  \[{{H}_{3}}P{{O}_{3}}\] done clear
  View Solution play_arrow

• question_answer134)
  Which of the following is not used as a Lewis acid [MP PET 2000]
  A)
                  \[SnC{{l}_{4}}\] done clear
  B)
                  \[FeC{{l}_{3}}\] done clear
  C)
                  \[KCl\]  done clear
  D)
                  \[B{{F}_{3}}\] done clear
  View Solution play_arrow

• question_answer135)
  Orthoboric acid in aqueous medium is    [AMU 2000]
  A)
                  Monobasic          done clear
  B)
                  Dibasic done clear
  C)
                  Tribasic done clear
  D)
                  All are correct done clear
  View Solution play_arrow

• question_answer136)
  According to Lewis concept which one of the following is not a base        [MP PET/PMT 1988; Pb. CET 2003]
  A)
                  \[O{{H}^{-}}\]    done clear
  B)
                  \[{{H}_{2}}O\] done clear
  C)
                  \[A{{g}^{+}}\]    done clear
  D)
                  \[N{{H}_{3}}\] done clear
  View Solution play_arrow

• question_answer137)
  The aqueous solution of ammonium chloride is [CPMT 1987]
  A)
                  Neutral                 done clear
  B)
                  Basic done clear
  C)
                  Acidic    done clear
  D)
                  Amphoteric done clear
  View Solution play_arrow

• question_answer138)
  In the process \[BC{{l}_{3}}+P{{H}_{3}}\to BC{{l}_{3}}:P{{H}_{3}}\] The Lewis acid is  [RPMT 2000]
  A)
                  \[P{{H}_{3}}\]    done clear
  B)
                  \[BC{{l}_{3}}\] done clear
  C)
                  Both      done clear
  D)
                  None done clear
  View Solution play_arrow

• question_answer139)
  The conjugate acid of \[N{{H}_{3}}\] is [BHU Varanasi 1999; Pb. PMT 2004]
  A)
                  \[N{{H}_{3}}\]   done clear
  B)
                  \[NH_{4}^{+}\] done clear
  C)
                  \[{{N}_{2}}{{H}_{4}}\]    done clear
  D)
                  \[N{{H}_{2}}OH\] done clear
  View Solution play_arrow

• question_answer140)
  Which halide of nitrogen is least basic     [DPMT 2001]
  A)
                  \[NB{{r}_{3}}\]  done clear
  B)
                  \[N{{I}_{3}}\] done clear
  C)
                  \[NC{{l}_{3}}\]   done clear
  D)
                  \[N{{F}_{3}}\] done clear
  View Solution play_arrow

• question_answer141)
  When \[FeC{{l}_{3}}\] gets soluble in water, then its solution represents which of the characteristics      [MP PET/PMT 1988]
  A)
                  Amphoteric        done clear
  B)
                  Acidic done clear
  C)
                  Basic      done clear
  D)
                  Neutral done clear
  View Solution play_arrow

• question_answer142)
  Lewis acid are those substances                [MP PMT 1987]
  A)
                  Which accept electron pair done clear
  B)
                  Which provide \[{{H}^{+}}\]ion in the solution done clear
  C)
                  Which give electron pair done clear
  D)
                  Which accept \[O{{H}^{-}}\]ion done clear
  View Solution play_arrow

• question_answer143)
  The conjugate base of \[HCO_{3}^{-}\] is
  A)
                  \[{{H}_{2}}C{{O}_{3}}\]  done clear
  B)
                  \[CO_{3}^{2-}\] done clear
  C)
                  \[C{{O}_{2}}\]    done clear
  D)
                  \[{{H}_{2}}O\] done clear
  View Solution play_arrow

• question_answer144)
  In the reaction \[N{{H}_{3}}+B{{F}_{3}}\] ⇌ \[N{{H}_{3}}\to B{{F}_{3}},\,\,B{{F}_{3}}\] is [MP PMT 1989; MHCET 2001]
  A)
                  Lewis acid done clear
  B)
                  Lewis base done clear
  C)
                  Neither Lewis acid nor Lewis base done clear
  D)
                  Lewis acid and Lewis base both done clear
  View Solution play_arrow

• question_answer145)
  The strongest Lewis base in the following [MP PET/PMT 1988]
  A)
                  \[C{{H}_{3}}^{-}\]            done clear
  B)
                  \[{{F}^{-}}\] done clear
  C)
                  \[N{{H}_{2}}^{-}\]            done clear
  D)
                  \[O{{H}^{-}}\] done clear
  View Solution play_arrow

• question_answer146)
  The aqueous solution of \[CuS{{O}_{4}}\] is         [CPMT 1985]
  A)
                  Acidic    done clear
  B)
                  Basic done clear
  C)
                  Neutral                 done clear
  D)
                  Amphoteric done clear
  View Solution play_arrow

• question_answer147)
  The acid having the highest \[p{{K}_{a}}\] value among the following is                                  [JIPMER 2002]
  A)
                  \[HCOOH\]         done clear
  B)
                  \[C{{H}_{3}}COOH\] done clear
  C)
                  \[ClC{{H}_{2}}COOH\]    done clear
  D)
                  \[FC{{H}_{2}}COOH\] done clear
  View Solution play_arrow

• question_answer148)
  The indicator used in the titration of sodium carbonate with sulphuric acid is       [DPMT 2001]
  A)
                  Phenolphthalein done clear
  B)
                  Methyl orange done clear
  C)
                  Potassium ferrocynide done clear
  D)
                  Potassium ferricynide done clear
  View Solution play_arrow

• question_answer149)
  According to Bronsted law, water is a/an [MP PET/PMT 1988]
  A)
                  Base      done clear
  B)
                  Acid done clear
  C)
                  Acid and base both         done clear
  D)
                  Salt done clear
  View Solution play_arrow

• question_answer150)
  Which of the following can give base \[O{{H}^{-}}\] [MP PET/PMT 1988]
  A)
                  \[{{H}_{2}}O\]   done clear
  B)
                  \[{{H}_{3}}{{O}^{+}}\] done clear
  C)
                  \[{{H}_{2}}\]       done clear
  D)
                  \[HCl\] done clear
  View Solution play_arrow

• question_answer151)
  Conjugate base of \[HBr\]is        [MP PET/PMT 1988]
  A)
                  \[{{H}_{2}}B{{r}^{+}}\]   done clear
  B)
                  \[{{H}^{+}}\] done clear
  C)
                  \[B{{r}^{-}}\]      done clear
  D)
                  \[B{{r}^{-}}\] done clear
  View Solution play_arrow

• question_answer152)
  Molar heat of neutralization of \[NaOH\] with \[HCl\] in comparison to that of \[KOH\] with \[HN{{O}_{3}}\]is    [MP PMT 1989]
  A)
                  Less       done clear
  B)
                  More done clear
  C)
                  Equal     done clear
  D)
                  Depends on pressure done clear
  View Solution play_arrow

• question_answer153)
  Which of the following is not a Lewis acid              [J & K  2005]
  A)
                  \[B{{F}_{3}}\]     done clear
  B)
                  \[AlC{{l}_{3}}\] done clear
  C)
                  \[HCl\]  done clear
  D)
                  \[LiAl{{H}_{4}}\] done clear
  View Solution play_arrow

• question_answer154)
  The solvent which neither accepts proton nor donates proton is called                                   [RPMT 2000]
  A)
                  Amphoteric        done clear
  B)
                  Neutral done clear
  C)
                  Aprotic done clear
  D)
                  Amphiprotic done clear
  View Solution play_arrow

• question_answer155)
  For the reaction in aqueous solution \[Z{{n}^{2+}}+{{X}^{-}}\]⇄ \[Zn{{X}^{+}},\] the \[{{K}_{eq}}\] is greatest when \[X\]is                [Pb. PMT 1998]
  A)
                  \[{{F}^{-}}\]        done clear
  B)
                  \[NO_{3}^{-}\] done clear
  C)
                  \[ClO_{4}^{-}\]  done clear
  D)
                  \[{{I}^{-}}\] done clear
  View Solution play_arrow

• question_answer156)
  Why are strong acids generally used as standard solutions in acid-base titrations               [Pb. PMT 1998]
  A)
                  The \[pH\] at the equivalence point will always be 7 done clear
  B)
                  They can be used to titrate both strong and weak bases done clear
  C)
                  Strong acids form more stable solutions than weak acids done clear
  D)
                  The salts of strong acids do not hydrolysed done clear
  View Solution play_arrow

• question_answer157)
  For an aqueous solution, the characteristic species of acid is [RPMT 1999]
  A)
                  \[{{H}^{+}}\]ion                done clear
  B)
                  \[{{H}_{3}}{{O}^{+}}\]ion done clear
  C)
                  \[{{H}_{2}}^{+}\]ion        done clear
  D)
                  \[{{H}_{4}}{{O}^{+}}\]ion done clear
  View Solution play_arrow

• question_answer158)
  Which is a Lewis base     [CPMT 1988; JEE Orissa 2004]
  A)
                  \[{{B}_{2}}{{H}_{6}}\]     done clear
  B)
                  \[LiAl{{H}_{4}}\] done clear
  C)
                  \[Al{{H}_{3}}\]   done clear
  D)
                  \[N{{H}_{3}}\] done clear
  View Solution play_arrow

• question_answer159)
  For a weak acid, the incorrect statement is          [Pb. PMT 2004]
  A)
                  Its dissociation constant is low done clear
  B)
                  Its \[p{{K}_{a}}\] is very low  done clear
  C)
                  It is partially dissociated done clear
  D)
                  Solution of its sodium salt is alkaline in water done clear
  View Solution play_arrow

• question_answer160)
  Boron halides behave as Lewis acids, because of their [CBSE PMT 1996; BHU 2004]
  A)
                  Ionic nature        done clear
  B)
                  Acidic nature done clear
  C)
                  Covalent nature               done clear
  D)
                  Electron deficient nature done clear
  View Solution play_arrow

• question_answer161)
  Would gaseous HCl be considered as an Arrhenius acid [UPSEAT 2004]
  A)
                  Yes done clear
  B)
                  No done clear
  C)
                  Not known done clear
  D)
                  Gaseous HCl does not exist done clear
  View Solution play_arrow

• question_answer162)
  Which one of the following is called amphoteric solvent  [UPSEAT 2004]
  A)
                  Ammonium hydroxide done clear
  B)
                  Chloroform done clear
  C)
                  Benzene              done clear
  D)
                  Water done clear
  View Solution play_arrow

• question_answer163)
  Strongest conjugate base is        [DPMT 2004]
  A)
                  \[C{{l}^{-}}\]       done clear
  B)
                  \[B{{r}^{-}}\] done clear
  C)
                  \[{{F}^{-}}\]        done clear
  D)
                  \[{{I}^{-}}\] done clear
  View Solution play_arrow

• question_answer164)
  The conjugate base of \[{{H}_{2}}PO_{4}^{-}\] is               [AIEEE 2004]
  A)
                  \[{{H}_{3}}P{{O}_{4}}\]  done clear
  B)
                  \[{{P}_{2}}{{O}_{5}}\] done clear
  C)
                  \[PO_{4}^{3-}\]                done clear
  D)
                  \[HPO_{4}^{2-}\] done clear
  View Solution play_arrow

• question_answer165)
  Conjugate base of \[HSO_{4}^{-}\] is      [MH CET  2004]
  A)
                  \[SO_{4}^{2-}\] done clear
  B)
                  \[{{H}_{2}}S{{O}_{4}}\] done clear
  C)
                  \[{{H}_{3}}SO_{4}^{+}\]                done clear
  D)
                  None of these done clear
  View Solution play_arrow