Question

How would you show that hydrogen:

(a) is a non-supporter of combustion?

(b) is lighter than air?

Answer 1

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A) Hold a hydrogen gas filled jar with its mouth downwards. Place a lighted candle inside the jar. The candle gets extinguished but the gas bums with a pop sound.

B) The rising soap bubbles prove that hydrogen is lighter than air.

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Answer 2

Answer:

(a) Hold a hydrogen gas-filled jar with its mouth downwards. Place a lighted candle inside the jar.

The gas burns with a pop sound and the candle gets extinguished. This shows that hydrogen is a non-supporter of combustion.

Hydrogen gas does not support combustion.

(b) Take a delivery tube and place one of its ends in a soap solution kept in a trough and the other one in a flat bottom jar as shown in the figure. The soap bubbles containing hydrogen rise upward the air. The rising soap bubbles prove that hydrogen is lighter than air.

Hydrogen-filled soap bubbles rising upward in the soap solution and into the air shows that hydrogen is lighter than air.