Question

Name the compound used for testing carbon dioxide gas 10

Answer 1

Answer:     Lime water is use for testing carbon dioxide gas 10

Answer 2

Answer:

Calcium hydroxide

Ca(OH)2

Explanation:

When carbon dioxide gas is passed through the calcium hydroxide solution it turns milky due to formation of calcium carbonate which is milkish white insoluble.

But,when the excess amount of CO2 gas is passed through calcium hydroxide solution it milkish colour disappears due to the formation of calcium bicarbonate.(CaHCO3)

hence, the calcium hydroxide is used in most laboratories or experiments for testing the presence of carbon dioxide gas.