Hydrogen MCQ Questions and Answers for Practice

1. A hydrogen fuel cell is...............times more efficient than an engine

1. 10
2. 1
3. 3 - 2
4. 8 - 7

2. D₂O has higher value of following physical parameters than H₂O, except

1. Dielectric Constant
2. Molecular Mass
3. Melting Point
4. Density

3. Elements of which of the following group(s) of periodic table do not form hydrides.

1. Group 14
2. Groups 7, 8, 9
3. Group 13
4. Groups 15, 16, 17

4. How long does it take to fill your cars hydrogen tank at a fueling station?

1. about 60 minutes
2. 3-5 minutes
3. 8 minutes
4. 15 minutes

5. How many hydrogen fueling stations are operational in the U.S.?

1. 68
2. 8
3. 100
4. 12

6. Hydrogen peroxide is

1. neither oxidising nor reducing agent
2. an oxidising agent
3. a reducing agent
4. both an oxidising and a reducing agent

7. Hydrogen peroxide is obtained by the electrolysis of

1. fused sodium peroxide
2. water
3. sulphuric acid
4. hydrochloric acid

8. Hydrogen resembles halogens in many respects for which several factors are responsible. Of the following factors which one is most important in this respect?

1. Its small size.
2. Its tendency to lose an electron to form a cation.
3. Its tendency to gain a single electron in its valence shell to attain stable electronic configuration.
4. Its low negative electron gain enthalpy value.

9. In what form can you store hydrogen?

1. All of the above
2. Gas
3. Liquid
4. Solid

10. Only one element of..................forms hydride

1. group 9
2. group 6
3. group 7
4. group 8

11. P^{4O10 on hydrolysis produces}

1. PH³
2. H^3PO2
3. H^3PO3
4. H^3PO4

12. Radioactive elements emit alpha, Beta and Gamma rays and are characterised by their halflives. The radioactive isotope of hydrogen is

1. Hydronium
2. Protium
3. Deuterium
4. Tritium

13. Select the incorrect statement for H^{2O2 structure}

1. O–O–H bond angle in gas phase is more than in solid phase
2. It is non planar
3. O–O bond length is more in gaseous state than in solid phase
4. Both OH bond are in different plane

14. Syn-gas is a mixture of

1. CO + H^2CO3
2. CO+N²
3. O³
4. CO + H²

15. The electronic conguration of D (Isotope of Hydrogen)

1. 1s²2s²2p¹
2. 1s²
3. 1s²2s1¹
4. 1s¹