Uses of Hydrogen

Q. In fuel cells ______ is converted into electrical energy

1. Neutralization energy
2. Thermal energy
3. Kinetic energy
4. Potential energy

Q.

Which of the following reasons cause the limited use of H₂ as a fuel?

I) Its calorific value is low.
II) Its availability in free state is less.
III) It is difficult to store.
IV) It is not a clean fuel.

1. II and III

2. II, III and IV

3. I and III

4. I, II and III

Q. In which of the following industrial methods or processes, hydrogen gas is used?

1. Fuel cells
2. Production of methanol
3. Reduction of metal oxides into metal
4. Hydrochloric acid production

Q.

Which of the following processes does not entail a change in the atomic number?

1. gamma emission

2. alpha emission

3. positron emission

4. beta emission