Question

Combustion of hydrogen produces water which can be directly used as fire extinguisher.

• A. True
• B. False

Answer 1

The correct option is B False

Combustion of hydrogen gas is burning of hydrogen in the presence of oxygen. We are aware of the reaction of hydrogen with oxygen results in water.
$2H_2\left(g\right)+O_2\left(g\right)\to 2H_{2}O\left(g\right)$

An extinguisher should either cut off the supply of oxygen, or avoid the contact with fuel or decrease the temperature.
When hydrogen undergoes combustion, the product formed will be gaseous state of water.

Steam can't decrease the tempearture of combustion. Thus, the product can't be directly used as fire extinguisher. The steam obtained should be cooled to liquid form so that it can extinguish fire.