Question

Which of the following is/are true regarding hydrogen-powered fuel cells?

• A. It cause pollution
• B. It is non-polluting
• C. It is very efficient
• D. It is used in spacecraft and submarines

Answer 1

Answer: (B), (C), (D)

The correct options are
B

It is non-polluting

C

It is very efficient

D

It is used in spacecraft and submarines

Hydrogen full cells use $H_{2}and{O}_2$ and give energy and $H_{2}O$ as the product. They are non-polluting as there is nothing harmful produced unlike petrol engines.

They are very useful in spacecraft and submarines as they are a good source of electricity. And the pure water which they produce as a product can by directly used by the crew for drinking. This is why they are very efficient as there is nothing wasted.