JEE Main & Advanced Chemistry Equilibrium / साम्यावस्था Question Bank

done Critical Thinking Total Questions - 78

• question_answer1)
  The \[{{K}_{SP}}\] of \[AgI\] is \[1.5\times {{10}^{-16}}\]. On mixing equal volumes of the following solutions, precipitation will occur only with [AMU 2000]
  A)
                  \[{{10}^{-7}}M\,A{{g}^{+}}\] and \[{{10}^{-19}}M\,{{I}^{-}}\] done clear
  B)
                  \[{{10}^{-8}}M\,A{{g}^{+}}\]and \[{{10}^{-8}}M\,{{I}^{-}}\] done clear
  C)
                  \[{{10}^{-16}}M\,A{{g}^{+}}\]and \[{{10}^{-16}}M\,{{I}^{-}}\] done clear
  D)
                  \[{{10}^{-9}}M\,A{{g}^{+}}\]and \[{{10}^{-9}}M\,{{I}^{-}}\] done clear
  View Solution play_arrow

• question_answer2)
  The strongest Bronsted base in the following anion is [IIT 1981; MP PET 1992, 97; MP PMT 1994; RPMT 1999; KCET 2000; AIIMS 2001; UPSEAT 2002; AFMC 2002; Pb. CET 2004]
  A)
                  \[Cl{{O}^{-}}\]   done clear
  B)
                  \[ClO_{2}^{-}\] done clear
  C)
                  \[ClO_{3}^{-}\]  done clear
  D)
                  \[ClO_{4}^{-}\] done clear
  View Solution play_arrow

• question_answer3)
  Which one of the following compound is not a protonic acid        [CBSE PMT 2003]
  A)
                  \[S{{O}_{2}}{{(OH)}_{2}}\]           done clear
  B)
                  \[B{{(OH)}_{3}}\] done clear
  C)
                  \[PO{{(OH)}_{3}}\]          done clear
  D)
                  \[SO{{(OH)}_{2}}\] done clear
  View Solution play_arrow

• question_answer4)
  Calculate the hydrolysis constant of the salt containing \[N{{O}_{2}}\]. Given the \[{{K}_{a}}\] for \[HN{{O}_{2}}\]   \[=4.5\times {{10}^{-10}}\] [UPSEAT 2001]
  A)
                  \[2.22\times {{10}^{-5}}\]             done clear
  B)
                  \[2.02\times {{10}^{5}}\] done clear
  C)
                  \[4.33\times {{10}^{4}}\]              done clear
  D)
                  \[3.03\times {{10}^{-5}}\] done clear
  View Solution play_arrow

• question_answer5)
  The molar solubility \[(mol\ {{L}^{-1}})\] of a sparingly soluble salt \[M{{X}_{4}}\] is \['s'\]. The corresponding solubility product is \[{{K}_{sp}}\]. \['s'\]is given in terms of \[_{{{K}_{sp}}}\]by the relation            [AIEEE 2004]
  A)
                  \[s={{(256{{K}_{sp}})}^{1/5}}\]  done clear
  B)
                  \[s={{(128{{K}_{sp}})}^{1/4}}\] done clear
  C)
                  \[s={{({{K}_{sp}}/128)}^{1/4}}\]                done clear
  D)
                  \[s={{({{K}_{sp}}/256)}^{1/5}}\] done clear
  View Solution play_arrow

• question_answer6)
  Electrophiles are                                              [RPET 2000]
  A)
                  Lewis acids          done clear
  B)
                  Lewis base done clear
  C)
                  Bronsted acid    done clear
  D)
                  Bronsted base done clear
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• question_answer7)
  Total number of moles for the reaction \[2HI\,\,\]⇄ \[{{H}_{2}}+{{I}_{2}}.\] if \[\alpha \] is degree of dissociation is         [CBSE PMT 1996]
  A)
                  2              done clear
  B)
                  \[2-\alpha \] done clear
  C)
                  1              done clear
  D)
                  \[1-\alpha \]                 done clear
  View Solution play_arrow

• question_answer8)
  Which one is a Lewis acid              [RPMT 1997]
  A)
                  \[Cl{{F}_{3}}\]    done clear
  B)
                  \[{{H}_{2}}O\] done clear
  C)
                  \[N{{H}_{3}}\]   done clear
  D)
                  None of these done clear
  View Solution play_arrow

• question_answer9)
  Heat of neutralisation of weak acid and strong base is less than the heat of neutralisation of strong acid and strong base due to                                   [KCET 2002]
  A)
                  Energy has to be spent for the total dissociation of weak acid done clear
  B)
                  Salt of weak acid and strong base is not stable done clear
  C)
                  Incomplete dissociation of weak acid done clear
  D)
                  Incomplete neutralization of weak acid done clear
  View Solution play_arrow

• question_answer10)
  \[p{{K}_{a}}\] values of two acids A and B are 4 and 5. The strengths of these two acids are related as     [KCET 2001]
  A)
                  Acid A is 10 times stronger than acids B done clear
  B)
                  Strength of acid A: strength a of acid \[B=4:5\] done clear
  C)
                  The strengths of the two acids can not be compared done clear
  D)
                  Acid B is 10 times stronger than acid A                 done clear
  View Solution play_arrow

• question_answer11)
  The dissociation constant of two acids \[H{{A}_{1}}\] and \[H{{A}_{2}}\] are \[3.14\times {{10}^{-4}}\] and \[1.96\times {{10}^{-5}}\] respectively. The relative strength of the acids will be approximately            [RPMT 2000]
  A)
                  1 : 4        done clear
  B)
                  4 : 1 done clear
  C)
                  1 : 16      done clear
  D)
                  16 : 1 done clear
  View Solution play_arrow

• question_answer12)
  An aqueous solution of ammonium acetate is [NCERT 1980, 81; RPMT 1999]
  A)
                  Faintly acidic       done clear
  B)
                  Faintly basic done clear
  C)
                  Fairly acidic         done clear
  D)
                  Almost neutral done clear
  View Solution play_arrow

• question_answer13)
  The dissociation constant of a weak acid is \[1.0\times {{10}^{-5}},\] the equilibrium constant for the reaction with strong base is [MP PMT 1990]
  A)
                  \[1.0\times {{10}^{-5}}\]               done clear
  B)
                  \[1.0\times {{10}^{-9}}\] done clear
  C)
                   \[1.0\times {{10}^{9}}\]                done clear
  D)
                   \[1.0\times {{10}^{14}}\] done clear
  View Solution play_arrow

• question_answer14)
  The \[pH\] of \[0.1\,\,M\] solution of the following salts increases in the order                                  [IIT 1999]
  A)
                  \[NaCl<N{{H}_{4}}Cl<NaCN<HCl\] done clear
  B)
                  \[HCl<N{{H}_{4}}Cl<NaCl<NaCN\] done clear
  C)
                  \[NaCN<N{{H}_{4}}Cl<NaCl<HCl\] done clear
  D)
                  \[HCl<NaCl<NaCN<N{{H}_{4}}Cl\] done clear
  View Solution play_arrow

• question_answer15)
  Which of the following is the strongest acid [AMU 1999; MH CET 1999, 2002]
  A)
                  \[SO{{(OH)}_{2}}\]          done clear
  B)
                  \[S{{O}_{2}}{{(OH)}_{2}}\] done clear
  C)
                  \[Cl{{O}_{3}}(OH)\]         done clear
  D)
                  \[PO{{(OH)}_{3}}\] done clear
  View Solution play_arrow

• question_answer16)
  The strongest of the four acids listed below is [NCERT 1984]
  A)
                  \[mol\,\,litr{{e}^{-1}}.\]                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_answer17)
  Which equilibrium can be described as an acid-base reaction using the Lewis acid-base definition but not using the Bronsted-Lowry definition           [AIIMS 1980]
  A)
                  \[2N{{H}_{3}}+{{H}_{2}}S{{O}_{4}}\]⇄ \[2NH_{4}^{+}+SO_{4}^{2-}\] done clear
  B)
                  \[N{{H}_{3}}+C{{H}_{3}}COOH\]⇄ \[NH_{4}^{+}+C{{H}_{3}}CO{{O}^{-}}\] done clear
  C)
                  \[{{H}_{2}}O+C{{H}_{3}}COOH\]⇄ \[{{H}_{3}}{{O}^{+}}+C{{H}_{3}}CO{{O}^{-}}\] done clear
  D)
                  \[{{[Cu{{({{H}_{2}}O)}_{4}}]}^{2+}}+4N{{H}_{3}}\]⇄ \[{{[Cu{{(N{{H}_{3}})}_{4}}]}^{2+}}+4{{H}_{2}}O\] done clear
  View Solution play_arrow

• question_answer18)
  The hydride ion \[{{H}^{-}}\]is stronger base than its hydroxide ion \[O{{H}^{-}}.\] Which of the following reaction will occur if sodium hydride \[(NaH)\] is dissolved in water               [CBSE PMT 1997]
  A)
                  \[{{H}^{-}}(aq)+{{H}_{2}}O\,\to \,{{H}_{2}}O\] done clear
  B)
                  \[{{H}^{-}}\,(aq)+{{H}_{2}}O\,(l)\,\to \,O{{H}^{-}}+{{H}_{2}}\] done clear
  C)
                  \[{{H}^{-}}\,+{{H}_{2}}O\,\to \]No reaction done clear
  D)
                  None of these done clear
  View Solution play_arrow

• question_answer19)
  Dissociation constant of a weak acid is \[1\times {{10}^{-4}}\]. Equilibrium constant of its reaction with strong base is      [UPSEAT 2003]
  A)
                  \[1\times {{10}^{-4}}\]   done clear
  B)
                  \[1\times {{10}^{10}}\] done clear
  C)
                  \[1\times {{10}^{-10}}\]                done clear
  D)
                  \[1\times {{10}^{14}}\] done clear
  View Solution play_arrow

• question_answer20)
  Arrange the acids (I) \[{{H}_{2}}S{{O}_{3}}\] (II) H3PO3 and (III) HClO3 in the decreasing order of acidity   [UPSEAT 2001]
  A)
                  I > III > II               done clear
  B)
                  I > II > III done clear
  C)
                  II > III > I               done clear
  D)
                  III > I > II done clear
  View Solution play_arrow

• question_answer21)
  Self-ionisation of liquid ammonia occurs as, \[2N{{H}_{3}}\]⇄\[NH_{4}^{+}+NH_{2}^{-};\,K={{10}^{-10}}\]. In this solvent, an acid might be  [JIPMER 2001]
  A)
                  \[NH_{4}^{+}\] done clear
  B)
                  \[N{{H}_{3}}\] done clear
  C)
                  Any species that will form \[NH_{4}^{+}\] done clear
  D)
                  All of these                 done clear
  View Solution play_arrow

• question_answer22)
  \[\Delta {{H}_{f}}\,({{H}_{2}}O)=X;\] Heat of neutralisation of \[C{{H}_{3}}COOH\]and \[NaOH\] will be                 [BHU 2003]
  A)
                  Less than 2X       done clear
  B)
                  Less than X done clear
  C)
                  X             done clear
  D)
                  Between X and 2X done clear
  View Solution play_arrow

• question_answer23)
  Which of the following oxides will not give \[O{{H}^{-}}\]in aqueous solution      [NCERT 1980]
  A)
                  \[F{{e}_{2}}{{O}_{3}}\]  done clear
  B)
                  \[HI\] done clear
  C)
                  \[L{{i}_{2}}O\]   done clear
  D)
                  \[{{K}_{2}}O\] done clear
  View Solution play_arrow

• question_answer24)
  A precipitate of \[Ca{{F}_{2}}\,\,({{K}_{sp}}=1.7\times {{10}^{-10}})\] will be obtained when equal volume of the following are mixed [MP PMT 1990, 95; IIT 1982; MNR 1992]
  A)
                  \[{{10}^{-4}}M\,C{{a}^{2+}}\] and \[{{10}^{-4}}M\,{{F}^{-}}\] done clear
  B)
                   \[{{10}^{-2}}M\,C{{a}^{2+}}\] and \[{{10}^{-3}}M\,{{F}^{-}}\] done clear
  C)
                  \[{{10}^{-5}}M\,C{{a}^{2+}}\] and \[{{10}^{-4}}M\,{{F}^{-}}\] done clear
  D)
                  \[{{10}^{-3}}M\,C{{a}^{2+}}\] and \[{{10}^{-4}}M\,{{F}^{-}}\] done clear
  View Solution play_arrow

• question_answer25)
  The degree of hydrolysis of a salt of weak acid and weak base in its 0.1 M solution is found to be 50%. If the molarity of the solution is 0.2 M, the percentage hydrolysis of the salt should be              [AMU 1999]
  A)
                  50%        done clear
  B)
                  35% done clear
  C)
                  75% done clear
  D)
                              100% done clear
  View Solution play_arrow

• question_answer26)
  The \[pH\] of 0.1 M solution of a weak monoprotic acid 1% ionized is      [UPSEAT 2001; Pb. PMT 2001]
  A)
                  1              done clear
  B)
                  2 done clear
  C)
                  3              done clear
  D)
                  4 done clear
  View Solution play_arrow

• question_answer27)
  Which one is the strongest acid [MH CET 1999; AMU 1999,2000; Pb.CET 2001,03; MP PET 2001]
  A)
                  \[HClO\]               done clear
  B)
                  \[HCl{{O}_{2}}\] done clear
  C)
                  \[{{H}_{2}}S{{O}_{4}}\]  done clear
  D)
                  \[HCl{{O}_{4}}\] done clear
  View Solution play_arrow

• question_answer28)
  Which of the following is Lewis acid         [Pb. CET 2000]
  A)
                  S              done clear
  B)
                  \[:C{{H}_{2}}\] done clear
  C)
                  \[{{(C{{H}_{3}})}_{3}}B\]               done clear
  D)
                  All of these done clear
  View Solution play_arrow

• question_answer29)
  The solubility product of Mg\[{{(OH)}_{2}}\]is\[1.2\times {{10}^{-11}}\]. The solubility of this compound in gram per \[100\,c{{m}^{3}}\] of solution is [Roorkee 2000]
  A)
                  \[1.4\times {{10}^{-4}}\]               done clear
  B)
                  \[8.16\times {{10}^{-4}}\] done clear
  C)
                  0.816     done clear
  D)
                  1.4 done clear
  View Solution play_arrow

• question_answer30)
  What is \[[{{H}^{+}}]\] of a solution that is \[0.01\,M\] in \[HCN\]and \[0.02\,M\] in \[NaCN\] \[({{K}_{a}}\]for \[HCN=6.2\times {{10}^{-10}})\]                                              [MP PMT 2000]
  A)
                  \[3.1\times {{10}^{10}}\]              done clear
  B)
                  \[6.2\times {{10}^{5}}\] done clear
  C)
                  \[6.2\times {{10}^{-10}}\]             done clear
  D)
                  \[3.1\times {{10}^{-10}}\] done clear
  View Solution play_arrow

• question_answer31)
  Which is neucleophile    [DPMT 2001; RPMT 2002]
  A)
                  \[B{{F}_{3}}\]     done clear
  B)
                  \[N{{H}_{3}}\] done clear
  C)
                  \[BeC{{l}_{2}}\] done clear
  D)
                  \[{{H}_{2}}O\] done clear
  View Solution play_arrow

• question_answer32)
  The solubility of \[CuBr\]is \[2\times {{10}^{-4}}mol/l\]at \[25{}^\circ C\]. The \[{{K}_{sp}}\] value for \[CuBr\]is                                                [AIIMS 2002]
  A)
                  \[4\times {{10}^{-8}}mo{{l}^{2}}{{l}^{-2}}\]          done clear
  B)
                  \[4\times {{10}^{-11}}mo{{l}^{2}}{{L}^{-1}}\] done clear
  C)
                  \[4\times {{10}^{-4}}mo{{l}^{2}}{{l}^{-2}}\] done clear
  D)
                  \[4\times {{10}^{-15}}mo{{l}^{2}}{{l}^{-2}}\] done clear
  View Solution play_arrow

• question_answer33)
  A 0.004 M solution of \[N{{a}_{2}}S{{O}_{4}}\] is isotonic with a 0.010 M solution of glucose at same temperature. The apparent degree of disociation of \[N{{a}_{2}}S{{O}_{4}}\] is [IIT JEE Screening 2004]
  A)
                  25%        done clear
  B)
                  50% done clear
  C)
                  75%        done clear
  D)
                  85% done clear
  View Solution play_arrow

• question_answer34)
  \[{{K}_{sp}}\] for \[Cr{{(OH)}_{3}}\]is \[2.7\times {{10}^{-31}}\]. What is its solubility in moles / litre.        [JEE Orissa 2004]
  A)
                  \[1\times {{10}^{-8}}\]   done clear
  B)
                  \[8\times {{10}^{-8}}\] done clear
  C)
                  \[1.1\times {{10}^{-8}}\]               done clear
  D)
                  \[0.18\times {{10}^{-8}}\] done clear
  View Solution play_arrow

• question_answer35)
  \[p{{K}_{a}}\]of acetic acid is \[4.74\]. The concentration of \[C{{H}_{3}}COONa\] is 0.01 M. The pH of \[C{{H}_{3}}OONa\]is [Orissa JEE 2004]
  A)
                  3.37        done clear
  B)
                  4.37 done clear
  C)
                  4.74        done clear
  D)
                  0.474                 done clear
  View Solution play_arrow

• question_answer36)
  If the solubility product of \[AgBr{{O}_{3}}\] and \[A{{g}_{2}}S{{O}_{4}}\]are \[5.5\times {{10}^{-5}}\] and \[2\times {{10}^{-5}}\]respectively, the relationship between the solubilities of these can be correctly represented as       [EAMCET 1985]
  A)
                  \[{{S}_{AgBr{{O}_{3}}}}>{{S}_{A{{g}_{2}}S{{O}_{4}}}}\]   done clear
  B)
                  \[{{S}_{AgBr{{O}_{3}}}}<{{S}_{A{{g}_{2}}S{{O}_{4}}}}\] done clear
  C)
                  \[{{S}_{AgBr{{O}_{3}}}}={{S}_{A{{g}_{2}}S{{O}_{4}}}}\]   done clear
  D)
                  \[{{S}_{AgBr{{O}_{3}}}}\approx {{S}_{A{{g}_{2}}S{{O}_{4}}}}\] done clear
  View Solution play_arrow

• question_answer37)
  The ionisation constant of phenol is higher than that of ethanol because                                               [JIPMER 2002]
  A)
                  Phenoxide ion is bulkier than ethanoxide done clear
  B)
                  Phenoxide ion is stronger base than ethanoxide done clear
  C)
                  Phenoxide ion is stabilised through delocalization done clear
  D)
                  Phenoxide ion is less stable than ethoxide done clear
  View Solution play_arrow

• question_answer38)
  A weak acid HX has the dissociation constant \[1\times {{10}^{-5}}M\]. It forms a salt NaX on reaction with alkali. The degree of hydrolysis of 0.1 M solution of NaX is                                                 [IIT JEE Screening 2004]
  A)
                  0.0001%               done clear
  B)
                  0.01% done clear
  C)
                  0.1%      done clear
  D)
                  0.15%                 done clear
  View Solution play_arrow

• question_answer39)
  In the equilibrium \[{{A}^{-}}+{{H}_{2}}O\]⇌\[HA+O{{H}^{-}}\] \[({{K}_{a}}=1.0\times {{10}^{-5}})\]. The degree of hydrolysis of 0.001 M solution of the salt is           [AMU 1999]
  A)
                  \[{{10}^{-3}}\]   done clear
  B)
                  \[{{10}^{-4}}\] done clear
  C)
                  \[{{10}^{-5}}\]   done clear
  D)
                  \[{{10}^{-6}}\] done clear
  View Solution play_arrow

• question_answer40)
  The sulphide ion concentration \[[{{S}^{2-}}]\]in saturated \[{{H}_{2}}S\] solution is \[1\times {{10}^{-22}}.\] Which of the following sulphides should be quantitatively precipitated by \[{{H}_{2}}S\] in the presence of dil. \[HCl\] Sulphide               Solubility Product (I)                           \[1.4\times {{10}^{-16}}\] (II)                          \[1.2\times {{10}^{-22}}\] (III)                         \[8.2\times {{10}^{-46}}\] (IV)                        \[5.0\times {{10}^{-34}}\]
  A)
                  I, II          done clear
  B)
                  III, IV done clear
  C)
                  II, III, IV                done clear
  D)
                  Only I done clear
  View Solution play_arrow

• question_answer41)
  When equal volumes of the following solutions are mixed, precipitation of \[AgCl\,({{K}_{sp}}=1.8\times {{10}^{-10}})\] will occur only with [IIT 1988; CBSE PMT PMT 1992; DCE 2000]
  A)
                  \[{{10}^{-4}}M\,A{{g}^{+}}\] and \[{{10}^{-4}}M\,C{{l}^{-}}\]       done clear
  B)
                  \[{{10}^{-5}}M\,A{{g}^{+}}\] and \[{{10}^{-5}}M\,C{{l}^{-}}\]       done clear
  C)
                  \[{{10}^{-6}}M\,A{{g}^{+}}\] and \[{{10}^{-6}}M\,C{{l}^{-}}\]       done clear
  D)
                  \[{{10}^{-4}}M\,A{{g}^{+}}\] and \[{{10}^{-10}}M\,C{{l}^{-}}\] done clear
  View Solution play_arrow

• question_answer42)
  \[{{K}_{sp}}\] of an electrolyte AB is \[1\times {{10}^{-10}}.\] \[[{{A}^{+}}]={{10}^{-5}}M,\] which concentration of \[{{B}^{-}}\] will not give precipitate of AB [BHU 2003]
  A)
                  \[5\times {{10}^{-6}}\]   done clear
  B)
                  \[1\times {{10}^{-5}}\] done clear
  C)
                  \[2\times {{10}^{-5}}\]   done clear
  D)
                  \[5\times {{10}^{-5}}\] done clear
  View Solution play_arrow

• question_answer43)
  One litre of water contains \[{{10}^{-7}}mole\]hydrogen ions. The degree of ionization in water will be [CPMT 1985, 88, 93]
  A)
                  \[1.8\times {{10}^{-7}}%\]           done clear
  B)
                  \[0.8\times {{10}^{-9}}%\] done clear
  C)
                  \[3.6\times {{10}^{-7}}%\]           done clear
  D)
                  \[3.6\times {{10}^{-9}}%\]                 done clear
  View Solution play_arrow

• question_answer44)
  If the solubility products of \[AgCl\] and \[AgBr\] are \[1.0\times {{10}^{-8}}\,M\] and \[3.5\times {{10}^{-13}}\] respectively, then the relation between the solubilities (denoted by the symbol\['S'\]) of these salts can correctly be represented as [MP PET 1994]
  A)
                  \[S\]of \[AgBr\]is less than that of \[AgCl\] done clear
  B)
                  \[S\]of \[{{(C{{H}_{3}})}_{3}}{{C}^{+}}\]is greater than that of \[AgCl\] done clear
  C)
                  \[{{10}^{-11}}M\]of \[BOH+{{H}^{+}}\] is equal to that of \[AgCl\] done clear
  D)
                  \[S\]of \[AgBr\] is \[{{10}^{6}}\] times greater than that of \[AgCl\] done clear
  View Solution play_arrow

• question_answer45)
  If the solubility product of lead iodide \[(Pb{{l}_{2}})\] is \[3.2\times {{10}^{-8}},\] then its solubility in moles/litre will be                 [MP PMT 1990]
  A)
                  \[2\times {{10}^{-3}}\]   done clear
  B)
                  \[4\times {{10}^{-4}}\] done clear
  C)
                  \[1.6\times {{10}^{-5}}\]               done clear
  D)
                  \[1.8\times {{10}^{-5}}\] done clear
  View Solution play_arrow

• question_answer46)
  Calculate the solubility of \[AgCl\](s) in \[0.1\,M\,NaCl\]at \[25{}^\circ C.\,\] \[{{K}_{sp}}(AgCl)=2.8\times {{10}^{-10}}\]                                                [UPSEAT 2001]
  A)
                  \[3.0\times {{10}^{-8}}M{{L}^{-1}}\]        done clear
  B)
                  \[2.5\times {{10}^{-7}}M{{L}^{-1}}\] done clear
  C)
                  \[2.8\times {{10}^{-9}}M{{L}^{-1}}\]        done clear
  D)
                  \[2.5\times {{10}^{7}}M{{L}^{-1}}\]                 done clear
  View Solution play_arrow

• question_answer47)
  The solubility product of a binary weak electrolyte is \[4\times {{10}^{-10}}\] at \[298\,K\]. Its solubility in mol \[d{{m}^{-3}}\] at the same temperature is              [KCET 2001]
  A)
                  \[4\times {{10}^{-5}}\]   done clear
  B)
                  \[2\times {{10}^{-5}}\] done clear
  C)
                  \[8\times {{10}^{-10}}\]                done clear
  D)
                  \[16\times {{10}^{-20}}\]                 done clear
  View Solution play_arrow

• question_answer48)
  Solubility of \[16\times {{10}^{-4}}\,m/s\] at \[{{20}^{o}}C\]is \[1.435\times {{10}^{-3}}gm\,per\,litre\]. The solubility product of \[AgCl\] is [CPMT 1989; BHU 1997; AFMC 2000; CBSE PMT 2002]
  A)
                  \[C{{O}_{2}}\]    done clear
  B)
                  \[1\times {{10}^{-10}}\] done clear
  C)
                  \[1.435\times {{10}^{-5}}\]          done clear
  D)
                  \[108\times {{10}^{-3}}\] done clear
  View Solution play_arrow

• question_answer49)
  \[p{{K}_{a}}\] value for acetic acid at the experimental temperature is 5. The percentage hydrolysis of \[0.1\,\,M\] sodium acetate solution will be
  A)
                  \[1\times {{10}^{-4}}\]   done clear
  B)
                  \[1\times {{10}^{-2}}\] done clear
  C)
                  \[1\times {{10}^{-3}}\]   done clear
  D)
                  \[1\times {{10}^{-3}}\] done clear
  View Solution play_arrow

• question_answer50)
  At \[{{30}^{o}}C,\] the solubility of  \[A{{g}_{2}}C{{O}_{3}}\,({{K}_{sp}}=8\times {{10}^{-12}})\] would be greatest in one litre of   [MP PMT 1990]
  A)
                  \[0.05\,M\,N{{a}_{2}}C{{O}_{3}}\]            done clear
  B)
                  \[0.05\,M\,AgN{{O}_{3}}\] done clear
  C)
                  Pure water         done clear
  D)
                  \[0.05\,M\,N{{H}_{3}}\] done clear
  View Solution play_arrow

• question_answer51)
  The values of \[{{K}_{sp}}\]for \[CuS,\,\,A{{g}_{2}}S\] and \[HgS\] are \[{{10}^{-31}},\,{{10}^{42}}\] and \[{{10}^{-54}}\] respectively. The correct order of their solubility in water is         [MP PMT 2003]
  A)
                  \[A{{g}_{2}}S>HgS>CuS\]             done clear
  B)
                  \[HgS>CuS>A{{g}_{2}}S\] done clear
  C)
                  \[HgS>A{{g}_{2}}S>CuS\]             done clear
  D)
                  \[A{{g}_{2}}S>CuS>HgS\] done clear
  View Solution play_arrow

• question_answer52)
  The pH of a soft drink is 3.82. Its hydrogen ion concentration will be         [MP PET 1990]
  A)
                  \[1.96\times {{10}^{-2}}\,\,mol/l\]           done clear
  B)
                  \[1.96\times {{10}^{-3}}\,\,mol/l\] done clear
  C)
                  \[1.5\times {{10}^{-4}}\,\,mol/l\]              done clear
  D)
                  \[1.96\times {{10}^{-1}}\,\,mol/l\] done clear
  View Solution play_arrow

• question_answer53)
  The pH of a solution at \[25{}^\circ C\] containing \[0.10\,m\] sodium acetate and \[0.03\,m\] acetic acid is \[(p{{K}_{a}}\]for \[C{{H}_{3}}COOH=4.57)\]       [AIIMS 2002; BHU 2002]
  A)
                  4.09        done clear
  B)
                  5.09 done clear
  C)
                  6.10        done clear
  D)
                  7.09 done clear
  View Solution play_arrow

• question_answer54)
  A weak acid is 0.1% ionised in 0.1 M solution. Its pH is                 [BVP 2004]
  A)
                  2              done clear
  B)
                  3 done clear
  C)
                  4              done clear
  D)
                  1 done clear
  View Solution play_arrow

• question_answer55)
  The solubility product of \[A{{s}_{2}}{{S}_{3}}\] is \[2.8\times {{10}^{-72}}\]. What is the solubility of \[A{{s}_{2}}{{S}_{3}}\]                                                  [Pb. CET 2003]
  A)
                  \[1.09\times {{10}^{-15}}\ mole/litre\] done clear
  B)
                  \[1.72\times {{10}^{-15}}\ mole/litre\] done clear
  C)
                  \[2.3\times {{10}^{-16}}\ mole/litre\] done clear
  D)
                  \[1.65\times {{10}^{-36}}\ mole/litre\] done clear
  View Solution play_arrow

• question_answer56)
  For a weak acid \[HA\] with dissociation constant  \[{{10}^{-9}},\,\,pOH\] of its 0.1 M solution is                 [CBSE PMT 1989]
  A)
                  9              done clear
  B)
                  3 done clear
  C)
                  11           done clear
  D)
                  10 done clear
  View Solution play_arrow

• question_answer57)
  The dissociation of water at \[{{25}^{o}}C\]is \[1.9\times {{10}^{-7}}%\] and the density of water is \[1.0\,g/c{{m}^{3}}.\] The ionisation constant of water is           [IIT 1995]
  A)
                  \[3.42\times {{10}^{-6}}\]             done clear
  B)
                  \[3.42\times {{10}^{-8}}\] done clear
  C)
                  \[1.00\times {{10}^{-14}}\]          done clear
  D)
                  \[2.00\times {{10}^{-16}}\] done clear
  View Solution play_arrow

• question_answer58)
  What is the pH of 0.01 M glycine solution? For glycine, \[K{{a}_{1}}=4.5\times {{10}^{-3}}\]and \[K{{a}_{2}}=1.7\times {{10}^{-10}}\]at 298 K  [AIIMS 2004]
  A)
                  3.0          done clear
  B)
                  10.0 done clear
  C)
                  6.1          done clear
  D)
                  7.2 done clear
  View Solution play_arrow

• question_answer59)
  The concentration of \[[{{H}^{+}}]\] and concentration of \[[O{{H}^{-}}]\] of a 0.1 aqueous solution of 2% ionised weak acid is [Ionic product of water \[=1\times {{10}^{-14}}]\] [DPMT 2004; CBSE PMT 1999]
  A)
                  \[2\times {{10}^{-3}}\]M and \[5\times {{10}^{-12}}\]M done clear
  B)
                  \[1\times {{10}^{3}}\ M\ \text{and}\ 3\times {{10}^{-11}}M\] done clear
  C)
                  \[0.02\times {{10}^{-3}}\ M\ \text{and}\ 5\times {{10}^{-11}}M\] done clear
  D)
                  \[3\times {{10}^{-2}}\ M\ \text{and}\ 4\times {{10}^{-13}}M\] done clear
  View Solution play_arrow

• question_answer60)
  If solubility product of \[HgS{{O}_{4}}\] is \[6.4\times {{10}^{-5}}\], then its solubility is   [BHU 2004]
  A)
                  \[8\times {{10}^{-3}}mole/litre\]              done clear
  B)
                  \[6.4\times {{10}^{-5}}mole/litre\] done clear
  C)
                  \[6.4\times {{10}^{-3}}mole/litre\]           done clear
  D)
                  \[2.8\times {{10}^{-6}}mole/litre\] done clear
  View Solution play_arrow

• question_answer61)
  At 298K a 0.1 M \[C{{H}_{3}}COOH\]solution is 1.34% ionized. The ionization constant \[{{K}_{a}}\] for acetic acid will be  [AMU 2002; AFMC 2005]
  A)
                  \[1.82\times {{10}^{-5}}\]             done clear
  B)
                  \[18.2\times {{10}^{-5}}\] done clear
  C)
                  \[0.182\times {{10}^{-5}}\]          done clear
  D)
                  None of these   done clear
  View Solution play_arrow

• question_answer62)
  Hydrogen ion concentration of an aqueous solution is \[1\times {{10}^{-4}}M\]. The solution is diluted with equal volume of water. Hydroxyl ion concentration of the resultant solution in terms of mol \[d{{m}^{-3}}\] is      [KCET 2001]
  A)
                  \[1\times {{10}^{-8}}\]   done clear
  B)
                  \[1\times {{10}^{-6}}\] done clear
  C)
                  \[2\times {{10}^{-10}}\]                done clear
  D)
                  \[0.5\times {{10}^{-10}}\] done clear
  View Solution play_arrow

• question_answer63)
  Which one of the following is not a buffer solution [AIIMS 2003]
  A)
                  \[0.8\,M\,{{H}_{2}}S+0.8\,M\,KHS\] done clear
  B)
                  \[2\,M\,{{C}_{6}}{{H}_{5}}N{{H}_{2}}+2M\,{{C}_{6}}{{H}_{5}}\overset{+}{\mathop{N}}\,{{H}_{3}}\,Br\] done clear
  C)
                  \[3\,M\,{{H}_{2}}C{{O}_{3}}+3\,M\,KHC{{O}_{3}}\] done clear
  D)
                  \[0.05\,M\,KCl{{O}_{4}}+0.05\,M\,HCl{{O}_{4}}\] done clear
  View Solution play_arrow

• question_answer64)
  The hydrogen ion concentration of a \[0.006\,\,M\] benzoic acid solution is \[({{K}_{a}}=6\times {{10}^{-5}})\]   [MP PET 1994]
  A)
                  \[0.6\times {{10}^{-4}}\]               done clear
  B)
                  \[6\times {{10}^{-4}}\] done clear
  C)
                  \[6\times {{10}^{-5}}\]   done clear
  D)
                  \[3.6\times {{10}^{-4}}\] done clear
  View Solution play_arrow

• question_answer65)
  Calculate the amount of \[{{(N{{H}_{4}})}_{2}}S{{O}_{4}}\] in grams which must be added to 500 ml of \[0.200\,M\,N{{H}_{3}}\] to yield a solution with \[pH=9.35\] \[({{K}_{b}}\] for \[N{{H}_{3}}=1.78\times {{10}^{-5}})\]     [UPSEAT 2001]
  A)
                  10.56 gm              done clear
  B)
                  15 gm done clear
  C)
                  12.74 gm              done clear
  D)
                  16.25 gm done clear
  View Solution play_arrow

• question_answer66)
  pH of a solution produced when an aqueous solution of \[pH\] 6 is mixed with an equal volume of an aqueous solution of \[pH\] 3 is about               [KCET 2001]
  A)
                  3.3          done clear
  B)
                  4.3 done clear
  C)
                  4.0          done clear
  D)
                  4.5 done clear
  View Solution play_arrow

• question_answer67)
  Calculate the \[{{H}^{+}}\] ion concentration in a \[1.00\,\,(M)\] \[\,HCN\,\]litre solution \[({{K}_{a}}=4\times {{10}^{-10}})\]   [Bihar CEE 1995]
  A)
                  \[4\times {{10}^{-14}}\,mole/litre\] done clear
  B)
                  \[2\times {{10}^{-5}}\,mole/litre\] done clear
  C)
                  \[2.5\times {{10}^{-5}}\,mole/litre\] done clear
  D)
                  None of these done clear
  View Solution play_arrow

• question_answer68)
  The number of moles of hydroxide \[(O{{H}^{-}})\] ion in 0.3 litre of 0.005 M solution of \[Ba{{(OH)}_{2}}\] is      [JIPMER 2001]
  A)
                  0.0050   done clear
  B)
                  0.0030 done clear
  C)
                  0.0015   done clear
  D)
                  0.0075 done clear
  View Solution play_arrow

• question_answer69)
  The pH of pure water or neutral solution at \[50{}^\circ C\] is ?. \[(p{{K}_{w}}=13.26\]\[=13.26\] at \[50{}^\circ C)\] [Pb. PMT 2002; DPMT 2002]
  A)
                  7.0          done clear
  B)
                  7.13 done clear
  C)
                  6.0          done clear
  D)
                  6.63 done clear
  View Solution play_arrow

• question_answer70)
  pH of 0.1 M solution of a weak acid (HA) is 4.50. It is neutralised with \[NaOH\] solution to decrease the acid content to half pH of the resulting solution         [JIPMER 2002]
  A)
                  4.50        done clear
  B)
                  8.00 done clear
  C)
                  7.00        done clear
  D)
                  10.00 done clear
  View Solution play_arrow

• question_answer71)
  If \[50\,ml\] of \[0.2\,M\,KOH\] is added to \[40\,ml\] of \[0.5\,M\,HCOOH,\] the \[pH\] of the resulting solution is \[({{K}_{a}}=1.8\times {{10}^{-4}})\] [MH CET 2000]
  A)
                  3.4          done clear
  B)
                  7.5 done clear
  C)
                  5.6          done clear
  D)
                  3.75 done clear
  View Solution play_arrow

• question_answer72)
  The Bronsted acids in the reversible reaction are \[HCO_{3}^{-}(aq.)+O{{H}^{-}}(aq.)\,\]⇄\[CO_{3}^{2-}(aq.)+{{H}_{2}}O\]    [DPMT 2002]
  A)
                  \[O{{H}^{-}}\] and \[CO_{3}^{2-}\] done clear
  B)
                  \[O{{H}^{-}}\] and \[{{H}_{2}}O\] done clear
  C)
                  \[HCO_{3}^{-}\] and \[{{H}_{2}}O\] done clear
  D)
                  \[HCO_{3}^{-}\] and \[CO_{3}^{2-}\] done clear
  View Solution play_arrow

• question_answer73)
  A 0.1N solution of an acid at room temperature has a degree of ionisation 0.1. The concentration of \[O{{H}^{-}}\] would be                 [MH CET 1999]
  A)
                  \[{{10}^{-12}}M\]             done clear
  B)
                  \[{{10}^{-11}}M\] done clear
  C)
                  \[{{10}^{-9}}M\]               done clear
  D)
                  \[{{10}^{-2}}M\] done clear
  View Solution play_arrow

• question_answer74)
  Increasing order of acidic character would be      [RPMT 1999]
  A)
                  \[C{{H}_{3}}COOH<{{H}_{2}}S{{O}_{4}}<{{H}_{2}}C{{O}_{3}}\] done clear
  B)
                  \[C{{H}_{3}}COOH<{{H}_{2}}C{{O}_{3}}<{{H}_{2}}S{{O}_{4}}\] done clear
  C)
                  \[{{H}_{2}}C{{O}_{3}}<C{{H}_{3}}COOH<{{H}_{2}}S{{O}_{4}}\] done clear
  D)
                  \[{{H}_{2}}S{{O}_{4}}<{{H}_{2}}C{{O}_{3}}<C{{H}_{3}}COOH\] done clear
  View Solution play_arrow

• question_answer75)
  The correct order of increasing \[[{{H}_{3}}{{O}^{+}}]\] in the following aqueous solutions is       [UPSEAT 2000]
  A)
                  0.01 M H2S <0.01 M H2SO4 < 0.01 M NaCl < 0.01 \[M\,NaN{{O}_{2}}\] done clear
  B)
                  0.01 M NaCl <0.01 M NaNO2 < 0.01 M H2S < 0.01 M H2SO4 done clear
  C)
                  0.01 M NaNO2 <0.01 M NaCl < 0.01 M H2S< 0.01 M H2SO4 done clear
  D)
                  0.01 M H2S < 0.01 M NaNO2 < 0.01 M NaCl < 0.01 M H2SO4 done clear
  View Solution play_arrow

• question_answer76)
  A base dissolved, in water, yields a solution with a hydroxyl ion concentration of \[0.05\,mol\,litr{{e}^{-1}}\]. The solution is [CBSE PMT 2000]
  A)
                  Basic      done clear
  B)
                  Acid done clear
  C)
                  Neutral done clear
  D)
                  Either B or C done clear
  View Solution play_arrow

• question_answer77)
  In the given reaction, the oxide of sodium is ?.\[\left[ \begin{matrix}    4Na+{{O}_{2}}\to 2N{{a}_{2}}O  \\    N{{a}_{2}}O+{{H}_{2}}O\to 2NaOH  \\ \end{matrix} \right]\]                    [Orissa JEE 2002]
  A)
                  Acidic    done clear
  B)
                  Basic done clear
  C)
                  Amphoteric        done clear
  D)
                  Neutral done clear
  View Solution play_arrow

• question_answer78)
  What is the pH of a 1M \[C{{H}_{3}}COOH\]a solution \[{{K}_{a}}\] of acetic acid \[=1.8\times {{10}^{-5}}.\] \[K={{10}^{-14}}mo{{l}^{2}}litr{{e}^{-2}}\]                                            [DPMT 2002]
  A)
                  9.4          done clear
  B)
                  4.8 done clear
  C)
                  3.6          done clear
  D)
                  2.4 done clear
  View Solution play_arrow