Question

Assertion (A): Although hydrogen is a potential source of heat energy, it is not used as a domestic fuel.

Reason (R): Hydrogen gas burns with an explosion.

• A. Both (A) and (R) are true and (R) is the correct explanation of (A).
• B. Both (A) and (R) are true but (R) is not the correct explanation of (A).
• C. Both (A) and (R) are false.
• D. (A) is true but (R) is false.

Answer 1

The correct option is A Both (A) and (R) are true and (R) is the correct explanation of (A).

Hydrogen has a calorific value of about 143 kJ/kg which is higher than the fuels like methane, coal, etc. But it is not used as a domestic fuel due to some limitations. These are:

• It burns quickly with an explosion.
• It is also difficult to store and transport it.

So, both the assertion and the reason are true, and the reason is the correct explanation for the assertion.