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MCQ on Class 11 Chemistry Chapter 9 Hydrogen

(1) Hydrogen is most __________ element in the universe.
[A] Abundant
[B] None
[C] Both
[D] Consumer
Answer: Abundant
(2) The volume of 10 volume H2O2 required to liberate 500 ml of O2 at S.T.P. is :
[A] 25 ml
[B] 50 ml
[C] 100 ml
[D] 125 ml
Answer: 50 ml

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(3) Hydrogen is a good __________ agent.
[A] Oxidizing
[B] Reducing
[C] Acidic
[D] Basic
Answer: Reducing
(4) Atomic hydrogen is called
[A] Protium
[B] Deutrium
[C] Nascent Hydrogen
[D] Tritium
Answer: Nascent Hydrogen
(5) Hydrogen is the most abundant element on earth after______.
[A] Oxygen
[B] Carbon
[C] Sulphur
[D] None of the Above
Answer: Oxygen
(6) What is gram equivalent weight of hydrogen peroxide as reductant?
[A] 100
[B] 125
[C] 152
[D] None of the Above
Answer: 152
(7) _________________ on water decolourises H2O2
[A] O3
[B] Acidic KMnO4 solution
[C] Black Suspension of Lead Sulphide(PbS)
[D] None of these.
Answer: Black Suspension of Lead Sulphide(PbS)
(8) Pure H2O2 is:
[A] Semi – solid
[B] Liquid
[C] Solid
[D] Gas
Answer: Liquid
(9) The freezing point of heavy water is
[A] 0°C
[B] 3.8°C
[C] 4°C
[D] 1°C
Answer: 3.8°C
(10) Hydrogen has isotopes
[A] 2
[B] 3
[C] 4
[D] 5
Answer: 4
(11) Water gas is mixture of hydrogen H2 and
[A] CO
[B] CO2
[C] Cl2
[D] SO2
Answer: CO
(12) The volume strength of 1.5 NH2O2 solution is :
[A] 4.8
[B] 5.2
[C] 8.8
[D] 8.4
Answer: 8.4
(13) Atomic hydrogen is called
[A] Protium
[B] Deutrium
[C] Nascent Hydrogen
[D] Tritium
Answer: Nascent Hydrogen
(14) Which of the following statements regarding hydrogen peroxide is/ are incorrect?
[A] As aerating agent in production of sponge rubber
[B] As an antichlor
[C] For restoring white colour of blackened lead painting
[D] All of the above
Answer: All of the above
(15) Water shows anomalous behavior between
[A] 0 to 4°C
[B] 0 to 5°C
[C] 0 to -4°C
[D] 4 to 0°C
Answer: 0 to 4°C
(16) What is the product of the reaction of H2O2 with Cl2?
[A] O2 + HOCl
[B] HCl + O2
[C] H2O + HCl
[D] HCl + H2
Answer: HCl + O2
(17) Which of the following hydrides are generally nonstochiometric in nature?
[A] Ionic Hydrides
[B] Molecular Hydrides
[C] Interstitial Hydrides
[D] All of the Above.
Answer: Interstitial Hydrides
(18) H2O2 used in rocket has the concentration:
[A] 50%
[B] 90%
[C] 70%
[D] 30%
Answer: 90%
(19) The freezing point of heavy water is
[A] 0°C
[B] 3.8°C
[C] 4°C
[D] 1°C
Answer: 3.8°C
(20) Pure H2O2 is :
[A] Semi – solid
[B] Liquid
[C] Solid
[D] Gas
Answer: Liquid

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