Question

Most metals react with dilute mineral acids to give hydrogen gas. What is the characteristic test for hydrogen gas?​

Answer 1

Explanation:

Metals can produce hydrogen gas with hydrochloric acid only when the metal will be able to replace the hydrogen atom from the HCl. In order to replace the hydrogen atom from the HCl gas, the metals should be placed above the hydrogen atom in the reactivity series of metals.

Answer 2

Characteristics test of hydrogen gas is done by bringing burning candle near the source of hydrogen.

Explanation:

• Hydrogen gas burns when brought near a burning candle with popping sound.
• The Pop sound is the sound of a small explosion.
• Hydrogen gas is a highly inflammable gas.
• Most metals react with dilute mineral acids to give hydrogen gas
• Dilute acids reacts with metals giving a product as salt and hydrogen gas
• Magnesium +Hydrochloric acid → Magnesium chloride +Hydrogen.
• More reactive the metal faster will be the reaction.