Question

Observe the given figure and answer the following questions:
i) Presence of which gas is being tested in the given figure?
ii) Write down the observation for the given experiment.​

Answer 1

Answer:

i) carbon dioxide gas is being tested

ii) when we blow air into the test tube containing lime water we observe that the lime water turns milky showing the presence of carbon dioxide.

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Answer 2

Answer:

i) Presence of  Carbon dioxide gas is being tested in the given figure.

ii)  Carbon dioxide [Carbon dioxide reacts with limewater to form calcium carbonate. Insoluble calcium carbonate is responsible for appearance of white colour.

Explanation:

We inhale oxygen and exhale carbon dioxide.

When lime water $Ca(OH)_2$ react with $CO_2$ it became milky.

When we release  $CO_2$ in lime water it became miky.

i) Presence of  Carbon dioxide gas is being tested in the given figure.

ii)  Carbon dioxide [Carbon dioxide reacts with limewater to form calcium carbonate. Insoluble calcium carbonate is responsible for appearance of white colour.]