Question

Hydrogen gas is not widely used as a reducing agent because

• A. hydrogen decomposes to atomic hydrogen at higher temperature.
• B. hydrogen isomerises to ortho hydrogen at a higher temperature..
• C. many metals form hydrides at lower temperature.
• D. there is a risk of an explosion from oxygen and hydrogen in air.

Answer 1

The correct option is D there is a risk of an explosion from oxygen and hydrogen in air.

Hydrogen gas reacts with oxygen to form water and the reaction takes place with an explosion.