Question

Name the gas evolved when a metal reacts with water.

Answer 1

Answer:

Hydrogen

Explanation:

The metals react with oxygen in the water and results in the formation of hydrogen.

Answer 2

Answer: Hydrogen is the gas evolved when a metal reacts with water.

Explanation: The reaction of the metal with water depends upon the reactive metals. Metals like potassium and calcium vigorously react with water and form a base and also evolve hydrogen gas.

Few metals like zinc and iron react well with hot water just by forming a coating of oxide on their surface. Metals like silver and gold do not undergo any reaction with water.