NEET Chemistry Hydrogen & Its Compounds / हाइड्रोजन और इसके यौगिक Question Bank

done Self Evaluation Test - Hydrogen Total Questions - 60

• question_answer1)
  When electric current is passed through an ionic hydride in molten state:
  A)
  hydrogen is liberated at anode done clear
  B)
  hydrogen is liberated at cathode done clear
  C)
  hydride ion migrates towards cathode done clear
  D)
  hydride ion remains is solution done clear
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• question_answer2)
  Among \[Ca{{H}_{2}},N{{H}_{2}},NaH\] and \[{{B}_{2}}{{H}_{6}}\] which are covalent hydrides?
  A)
  \[N{{H}_{3}}\] and \[{{B}_{2}}{{H}_{6}}\]   done clear
  B)
  \[NaH\] and \[Ca{{H}_{2}}\] done clear
  C)
  \[NaH\] and \[N{{\text{H}}_{3}}\]            done clear
  D)
  \[Ca{{H}_{2}}\] and \[{{B}_{2}}{{H}_{6}}\] done clear
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• question_answer3)
  Polyphosphates are used as water softening agents because they
  A)
  form soluble complexes with anionic species done clear
  B)
  precipitate anionic species done clear
  C)
  form soluble complexes with cationic species done clear
  D)
  precipitate cationic species done clear
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• question_answer4)
  When two ice cubes are pressed over each other, they unite to form one cube. Which of the following forces is responsible to hold them together?
  A)
  Hydrogen bond formation done clear
  B)
  van der Waals forces done clear
  C)
  Covalent attraction done clear
  D)
  Ionic interaction done clear
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• question_answer5)
  Hydrogen molecules differs from chlorine molecule in the following respect
  A)
  Hydrogen molecule is non-polar but chlorine molecule is polar done clear
  B)
  Hydrogen molecule is polar while chlorine molecule is non-polar done clear
  C)
  Hydrogen molecule can form intermolecular hydrogen bonds but chlorine molecule does not done clear
  D)
  Hydrogen molecule cannot participate in coordination bond formation but chlorine molecule can done clear
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• question_answer6)
  The adsorption of hydrogen by metals is called
  A)
  Dehydrogenation done clear
  B)
  Hydrogenation done clear
  C)
  Occlusion           done clear
  D)
  Adsorption done clear
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• question_answer7)
  Which of the following statements do not define the characteristic property of water "Water is a universal solvent"
  A)
  It can dissolve maximum number of compounds done clear
  B)
  It has very low dielectric constant done clear
  C)
  It has high liquid range done clear
  D)
  None of these done clear
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• question_answer8)
  A, 6 volume sample of \[{{H}_{2}}{{O}_{2}}\]
  A)
  will contain 6% V/V of \[{{H}_{2}}{{O}_{2}}\] done clear
  B)
  will contain 6% W/V of \[{{H}_{2}}{{O}_{2}}\] done clear
  C)
  would give 6 volumes of oxygen per unit volume of \[{{H}_{2}}{{O}_{2}}\] sample at STP done clear
  D)
  would give 6 volumes of oxygen per unit weight of \[{{H}_{2}}{{O}_{2}}\] sample at STP done clear
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• question_answer9)
  34 g of \[{{H}_{2}}{{O}_{2}}\] is present in 1120 mL of solution. This solution is called      
  A)
  10 vol solution    done clear
  B)
  20 vol solution done clear
  C)
  34 vol solution                done clear
  D)
  32 vol solution done clear
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• question_answer10)
  Hydrogen can be fused to form helium at
  A)
  high temperature and high pressure done clear
  B)
  high temperature and low pressure done clear
  C)
  low temperature and high pressure done clear
  D)
  low temperature and low pressure done clear
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• question_answer11)
  The oxidation states of most electronegative element in the products of reaction \[Ba{{O}_{2}}\] with dil \[{{H}_{2}}{{O}_{2}}\] are
  A)
  0 and -1                        done clear
  B)
  -1 and -2  done clear
  C)
  -2 and 0                        done clear
  D)
  -2 and +1 done clear
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• question_answer12)
  A 5.0 mL solution of \[{{H}_{2}}{{O}_{2}}\] liberates 1.27 g of iodine from an acidified KI solution. The percentage strength of \[{{H}_{2}}{{O}_{2}}\] is
  A)
  11.2                  done clear
  B)
  5.6   done clear
  C)
  1.7                                done clear
  D)
  3.4 done clear
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• question_answer13)
  3.4 g sample of \[{{H}_{2}}{{O}_{2}}\] solution containing x% \[{{H}_{2}}{{O}_{2}}\] by weight requires x mL of \[KMn{{O}_{4}}\]solution for complete oxidation under acidic condition. The normality of \[KMn{{O}_{4}}\] solution is
  A)
  IN                                 done clear
  B)
  2N  done clear
  C)
  3N                    done clear
  D)
  0.5N done clear
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• question_answer14)
  \[{{H}_{2}}{{O}_{2}}\to 2{{H}^{+}}+{{O}_{2}}+2{{e}^{-}};E{}^\circ =-0.68V.\] This equation represents which of the following behaviour of\[{{H}_{2}}{{O}_{2}}\] ?
  A)
  Reducing   done clear
  B)
  Oxidising done clear
  C)
  Acidic                done clear
  D)
  Catalytic done clear
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• question_answer15)
  When a substance Areacts with water it produces a combustible gas B and a solution of substance C in water. When another substance D reacts with this solution of C, it also produces the same gas B on warming but D can produce gas B on reaction with dilute sulphuric acid at room temperature. A imparts a deep golden yellow colour to a smokeless flame of Bunsen burner. A, B, C and D respectively are 
  A)
  \[Na,{{H}_{2}},NaOH,Zn\] done clear
  B)
  \[K,{{H}_{2}},KOH,Al\] done clear
  C)
  \[Ca,{{H}_{2}},Ca{{\left( OH \right)}_{2}},Sn\] done clear
  D)
  \[Ca{{C}_{2}},{{C}_{2}}{{H}_{2}},Ca{{(OH)}_{2}},Fe\] done clear
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• question_answer16)
  \[HCl\] is added to following oxides. Which one would give \[{{H}_{2}}{{O}_{2}}\]
  A)
  \[Mn{{O}_{2}}\]                       done clear
  B)
  \[Pb{{O}_{2}}\] done clear
  C)
  \[BaO\]              done clear
  D)
  None done clear
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• question_answer17)
  Chemical A is used for water softening to remove temporary hardness. A reacts with sodium carbonate to generate caustic soda. When \[C{{O}_{2}}\] is bubbled through a solution of A, it turns cloudy. What is the chemical formula of A?
  A)
  \[CaC{{O}_{3}}\]   done clear
  B)
  \[CaO\] done clear
  C)
  \[Ca{{(OH)}_{2}}\]                   done clear
  D)
  \[Ca{{\left( HC{{O}_{3}} \right)}_{2}}\] done clear
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• question_answer18)
  Which physical property of dihydrogen is wrong?
  A)
  Odourless gas done clear
  B)
  Tasteless gas done clear
  C)
  Colourless gas done clear
  D)
  Non-inflammable gas done clear
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• question_answer19)
  Permanent hardness in water cannot be cured by:        
  A)
  Treatment with washing soda done clear
  B)
  Boiling done clear
  C)
  Calgon's method done clear
  D)
  Ion exchange method done clear
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• question_answer20)
  Which of the following metal evolves hydrogen on reaction with cold dilute\[HN{{O}_{3}}\]?
  A)
  Mg                                done clear
  B)
  Al    done clear
  C)
  Fe                                 done clear
  D)
  Cu done clear
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• question_answer21)
  The alum used for purifying water is
  A)
  Ferric alum         done clear
  B)
  Chrome alum done clear
  C)
  Potash alum      done clear
  D)
  Ammonium alum done clear
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• question_answer22)
  What is formed when calcium carbide reacts with heavy water?
  A)
  \[{{C}_{2}}{{D}_{2}}\]                        done clear
  B)
  \[Ca{{D}_{2}}\] done clear
  C)
  \[C{{a}_{2}}{{D}_{2}}O\]                   done clear
  D)
  \[C{{D}_{2}}\] done clear
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• question_answer23)
  The hydride ion \[{{H}^{-}}\] is stronger base than its hydroxide ion\[O{{H}^{-}}\]. Which of the following reactions will occur if sodium hydride \[\left( NaH \right)\] is dissolved in water?
  A)
  \[{{H}^{-}}(aq)+{{H}_{2}}O\to {{H}_{3}}{{O}^{-}}\] done clear
  B)
  \[{{H}^{-}}\left( aq \right)+{{H}_{2}}O\left( l \right)\to O{{H}^{-}}+{{H}_{2}}\] done clear
  C)
  \[{{H}^{-}}~+{{H}_{2}}O\to \] No reaction done clear
  D)
  None of these done clear
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• question_answer24)
  In context with the industrial preparation of hydrogen from water gas \[{{(CO+H)}_{2}}\] which of the following is the correct statement?
  A)
  \[CO\] and \[{{H}_{2}}\] are fractionally separated using differences in their densities done clear
  B)
  CO is removed by absorption in aqueous \[C{{u}_{2}}C{{l}_{2}}\] solution done clear
  C)
  \[{{H}_{2}}\] is removed through occlusion with Pd done clear
  D)
  CO is oxidised to \[C{{O}_{2}}\] with steam in the presence of a catalyst followed by absorption of \[C{{O}_{2}}\]in alkali done clear
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• question_answer25)
  The dielectric constant of \[{{H}_{2}}{{O}_{2}}\] is 80. The electrostatic force of attraction between \[N{{a}^{+}}\] and \[C{{l}^{-}}\] will be
  A)
  reduced to 1 /40 in water than in air done clear
  B)
  reduced to 1/80 in water than in air done clear
  C)
  will be increased to 80 in water than in air done clear
  D)
  will remain unchanged. done clear
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• question_answer26)
  Which of the following is not true?
  A)
  \[{{D}_{2}}O\] freezes at lower temperature than \[{{H}_{2}}O\] done clear
  B)
  Reaction between \[{{H}_{2}}\] and \[C{{l}_{2}}\] is much faster than \[{{D}_{2}}\]and \[C{{l}_{2}}\] done clear
  C)
  Ordinary water gets electrolysed more rapidly than \[{{D}_{2}}O\] done clear
  D)
  Bond dissociation energy of \[{{D}_{2}}\] is greater than \[{{H}_{2}}\] done clear
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• question_answer27)
  \[{{H}_{2}}{{O}_{2}}\] is always stored in black bottles because
  A)
  It is highly unstable done clear
  B)
  Its enthalpy of decomposition is high done clear
  C)
  It undergoes auto-oxidation on prolonged standing done clear
  D)
  None of these done clear
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• question_answer28)
  Which of the following is wrong about \[{{H}_{2}}{{O}_{2}}\] It is used
  A)
  as an aerating agent in production of sponge rubber done clear
  B)
  as an antichlor done clear
  C)
  for restoring white colour of blackened lead painting done clear
  D)
  None of these done clear
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• question_answer29)
  100 mL of 0.01 \[M\,KMn{{O}_{4}}\] oxidises 100 mL \[{{H}_{2}}{{O}_{2}}\] in acidic medium. Volume of the same\[KMn{{O}_{4}}\] required in alkaline medium to oxidise 100 mL of the same \[{{H}_{2}}{{O}_{2}}\] will be (\[MnO_{4}^{-}\] changes to \[M{{n}^{2+}}\] in acidic medium and to \[Mn{{O}_{2}}\] in alkaline medium) 
  A)
  \[\frac{100}{3}mL\]                   done clear
  B)
  \[\frac{500}{3}mL\] done clear
  C)
  \[\frac{300}{5}mL\]                   done clear
  D)
  None done clear
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• question_answer30)
  The purity of \[{{H}_{2}}{{O}_{2}}\] in a given sample is 85%. Calculate the weight of impure sample of \[{{H}_{2}}{{O}_{2}}\] which requires 10 mL of \[M/5\text{ }KMn{{O}_{4}}\] solution in titration in acidic medium
  A)
  2 g                                 done clear
  B)
  0.2 g done clear
  C)
  0.17 g                              done clear
  D)
  0.15 g done clear
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• question_answer31)
  Barium peroxide reacts with phosphoric acid to produce barium phosphate along with
  A)
  water                             done clear
  B)
  hydrogen peroxide done clear
  C)
  dioxygen            done clear
  D)
  phosphine done clear
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• question_answer32)
  The normality and volume strength of a solution made by mixing 1.0 L each of 5.6 volume and 11.2 volume \[{{H}_{2}}{{O}_{2}}\] solution are:
  A)
  1 N, 5.6 vol      done clear
  B)
  1.5 N, 5.6 vol done clear
  C)
  1.5 N, 8.4 vol                 done clear
  D)
  1 N, 8.4 vol done clear
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• question_answer33)
  The numbers of protons, electrons and neutrons in a molecule of heavy water are respectively:
  A)
  8, 10, 11          done clear
  B)
  10, 10, 10 done clear
  C)
  10, 11, 10         done clear
  D)
  11, 10, 10 done clear
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• question_answer34)
  2 g of aluminium is treated separately with excess of dilute \[{{H}_{2}}S{{O}_{4}}\] and excess of \[NaOH.\] The ratio of the volumes of hydrogen evolved is
  A)
  2:3                                done clear
  B)
  1:1   done clear
  C)
  2:1                                done clear
  D)
  1:2 done clear
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• question_answer35)
  Which of the following statements is correct?
  A)
  Hydrogen has same IP as alkali metals done clear
  B)
  Hydrogen has same electronegativity as halogens done clear
  C)
  Hydrogen has oxidation number of \[-1\]and +1 done clear
  D)
  Hydrogen will not be liberated at anode. done clear
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• question_answer36)
  Which of the following terms is not correct for hydrogen?
  A)
  Its molecule is diatomic done clear
  B)
  It exists both as \[{{H}^{+}}\] and \[{{H}^{-}}\] in different chemical compounds done clear
  C)
  It is the only species which has no neutrons in the nucleus done clear
  D)
  Heavy water is unstable because hydrogen is substituted by its isotope deuterium done clear
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• question_answer37)
  Hard water is not fit for washing clothes because
  A)
  it contains \[N{{a}_{2}}S{{O}_{4}}\] and \[KCl\] done clear
  B)
  It gives precipitate done clear
  C)
  it contains impurities done clear
  D)
  it is acidic in nature done clear
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• question_answer38)
  The amount of \[{{H}_{2}}{{\text{O}}_{2}}\] present in 1 litre of \[1.5N{{H}_{2}}{{\text{O}}_{2}}\] solution, is:
  A)
  25.5 g               done clear
  B)
  3.0 g  done clear
  C)
  8.0 g                 done clear
  D)
  2.5 g done clear
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• question_answer39)
  20 volume \[{{H}_{2}}{{O}_{2}}\] solution has a strength of about
  A)
  30%                  done clear
  B)
  6%   done clear
  C)
  3%                    done clear
  D)
  10% done clear
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• question_answer40)
  When same amount of zinc is treated separately with excess of sulphuric acid and excess of sodium hydroxide solution the ratio of volumes of hydrogen evolved is     
  A)
  1:1        done clear
  B)
  1:2  done clear
  C)
  2:1                                done clear
  D)
  9:4 done clear
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• question_answer41)
  Hydrogen at room temperature contains:
  A)
  25% ortho + 75% para done clear
  B)
  25% para + 75% ortho done clear
  C)
  50% ortho + 50% para done clear
  D)
  60% ortho + 34% para done clear
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• question_answer42)
  In Bosch's process, which gas is utilised for the production of hydrogen gas?
  A)
  Producer gas     done clear
  B)
  Water gas done clear
  C)
  Coal gas            done clear
  D)
  None of these done clear
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• question_answer43)
  \[{{D}_{2}}O\] is preferred to \[{{H}_{2}}O,\]as a moderator, in nuclear reactors because
  A)
  \[{{D}_{2}}O\] slows down fast neutrons better done clear
  B)
  \[{{D}_{2}}O\] has high specific heat done clear
  C)
  \[{{D}_{2}}O\] is cheaper done clear
  D)
  None of these done clear
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• question_answer44)
  Consider the following statements:

  1.	Atomic hydrogen is obtained by passing hydrogen through an electric arc.
  2.	Hydrogen gas will not reduce heated aluminium oxide.
  3.	Finely divided palladium adsorbs large volume of hydrogen gas
  4.	Pure nascent hydrogen is best obtained by reacting Na with \[{{C}_{2}}{{H}_{5}}OH\]
  	Which of the above statements is/are correct?

  A)
  1 alone              done clear
  B)
  2 alone done clear
  C)
  1, 2 and 3          done clear
  D)
  2, 3 and 4 done clear
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• question_answer45)
  Water is:
  A)
  more polar than \[{{H}_{2}}S\] done clear
  B)
  more or less identical in polarity with \[{{H}_{2}}S\] done clear
  C)
  less polar than \[{{H}_{2}}S\] done clear
  D)
  None of these done clear
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• question_answer46)
  Calgon used as a water softener is
  A)
  \[N{{a}_{2}}[N{{a}_{4}}{{(P{{O}_{3}})}_{6}}]\]        done clear
  B)
  \[N{{a}_{4}}[N{{a}_{2}}{{(P{{O}_{3}})}_{6}}]\] done clear
  C)
  \[N{{a}_{4}}[N{{a}_{4}}{{(P{{O}_{4}})}_{5}}]\]   done clear
  D)
  \[N{{a}_{4}}[N{{a}_{2}}{{(P{{O}_{4}})}_{6}}]\] done clear
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• question_answer47)
  In which of the following reactions, \[{{H}_{2}}{{O}_{2}}\] is acting as a reducing agent
  A)
  \[{{H}_{2}}{{O}_{2}}+S{{O}_{2}}\to {{H}_{2}}S{{O}_{4}}\] done clear
  B)
  \[2KI+{{H}_{2}}{{O}_{2}}\to 2KOH+{{I}_{2}}\] done clear
  C)
  \[PbS+4{{H}_{2}}{{O}_{2}}\to PbS{{O}_{4}}+4{{H}_{2}}O\] done clear
  D)
  \[A{{g}_{2}}O+{{H}_{2}}{{O}_{2}}\to 2Ag+{{H}_{2}}O+{{O}_{2}}\] done clear
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• question_answer48)
  Which of the following statements are correct?

  (i) Hydrogen peroxide is industrially prepared by the auto-oxidation of 2-alkyl anthraquinols

  (ii) One millilitre of 30% \[{{H}_{2}}{{O}_{2}}\] means that solution will give 100 V of oxygen at STP

  (iii) Dihedral angle of \[{{H}_{2}}{{O}_{2}}\] in gas phase is \[90.2{}^\circ \] and in solid phase dihedral angle is \[111.5{}^\circ \]

  A)
  (i), (ii) and (iii)    done clear
  B)
  (i) and (iii) done clear
  C)
  (ii) and (iii)         done clear
  D)
  (i) and (ii) done clear
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• question_answer49)
  When a sample of hard water is passed through the layer of sodium zeolite resulting which of the following ions will not be present in the resulting sample of water obtained?
  A)
  \[M{{g}^{2+}}\] and \[C{{a}^{2+}}\]   done clear
  B)
  \[C{{a}^{2+}}\] and \[N{{a}^{+}}\] done clear
  C)
  \[M{{g}^{2+}}\] and \[CO_{3}^{2-}\] done clear
  D)
  \[CO_{3}^{2-}\] and \[C{{l}^{-}}\] done clear
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• question_answer50)
  Which statement is wrong?
  A)
  Ordinary hydrogen is an equilibrium mixture of ortho and para hydrogen done clear
  B)
  In ortho hydrogen spin of two nuclei is in same direction done clear
  C)
  Ortho and para forms do not resemble in their chemical properties done clear
  D)
  In para hydrogen spin of two nuclei is in opposite direction. done clear
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• question_answer51)
  An orange coloured solution acidified with \[{{H}_{2}}S{{O}_{4}}\] and treated with a substance 'X' gives a blue coloured solution of\[Cr{{O}_{5}}\]. The substance 'X' is
  A)
  \[{{H}_{2}}{{O}_{2}}\]                                   done clear
  B)
  \[{{H}_{2}}O\] done clear
  C)
  dil \[HCl\]          done clear
  D)
  conc \[HCl\] done clear
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• question_answer52)
  Hydrogen peroxide acts both as an oxidising and as a reducing agent depending upon the nature of the reacting species. In which of the following cases \[{{H}_{2}}{{O}_{2}}\] acts as a reducing agent in acid medium?
  A)
  \[MnO_{4}^{-}\]                      done clear
  B)
  \[C{{r}_{2}}O_{7}^{2-}\] done clear
  C)
  \[SO_{3}^{2-}\]                       done clear
  D)
  KI done clear
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• question_answer53)
  Pick out the correct statement
  A)
  By decreasing the temperature pure para- hydrogen can be obtained done clear
  B)
  By increasing the temperature pure ortho- hydrogen can be obtained done clear
  C)
  By decreasing the temperature pure ortho- hydrogen can be obtained done clear
  D)
  By increasing the temperature pure para- hydrogen can be obtained done clear
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• question_answer54)
  An inorganic compound gives off \[{{O}_{2}}\] when heated, turns an acidic solution of KI violet and reduces acidified\[KMn{{O}_{4}}\]. The compound is
  A)
  \[S{{O}_{3}}\]                          done clear
  B)
  \[KN{{O}_{3}}\] done clear
  C)
  \[{{H}_{2}}{{O}_{2}}\]                                   done clear
  D)
  All of these done clear
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• question_answer55)
  The reaction of \[{{H}_{2}}{{O}_{2}}\] with sulphur is an example of........ reaction
  A)
  Addition            done clear
  B)
  Oxidation done clear
  C)
  Reduction          done clear
  D)
  Redox done clear
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• question_answer56)
  Which substance does not speed up decomposition of \[{{H}_{2}}{{O}_{2}}\]?
  A)
  Glycerol             done clear
  B)
  Pt done clear
  C)
  Gold                             done clear
  D)
  \[Mn{{O}_{2}}\] done clear
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• question_answer57)
  When zeolite (hydrated sodium aluminium silicate) is treated with hard water, the sodium ions are exchanged with
  A)
  \[{{H}^{+}}\] ions                   done clear
  B)
  \[C{{a}^{2+}}ions\] done clear
  C)
  \[S{{O}_{4}}^{2-}\] ions          done clear
  D)
  \[O{{H}^{-}}\] ions done clear
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• question_answer58)
  Saline hydrides react explosively with water, such fires can be extinguished by
  A)
  water                             done clear
  B)
  carbon dioxide done clear
  C)
  sand                              done clear
  D)
  None of these done clear
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• question_answer59)
  30 volume hydrogen peroxide means
  A)
  30% of \[{{H}_{2}}{{O}_{2}}\] solution done clear
  B)
  \[30\text{ }c{{m}^{3}}\] solution contains 1g of \[{{H}_{2}}{{O}_{2}}\] done clear
  C)
  \[1\text{ }c{{m}^{3}}\] of solution liberates \[30\text{ }c{{m}^{3}}\] of \[{{O}_{2}}\] at STP done clear
  D)
  \[30\text{ }c{{m}^{3}}\] of solution contains 1 mole of \[{{H}_{2}}{{O}_{2}}\] done clear
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• question_answer60)
  Hydrogen peroxide in its reaction with \[Kl{{O}_{4}}\] and \[N{{H}_{2}}OH\] respectively, is acting as a
  A)
  Reducing agent, oxidising agent done clear
  B)
  Reducing agent, reducing agent done clear
  C)
  Oxidising agent, oxidising agent done clear
  D)
  Oxidising agent, reducing agent done clear
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