MCQ on Class 11 Chemistry Chapter 9 Hydrogen

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Questions
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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