Q2 of 14 Page 79

Find the gases for which the following statements are related.

Gas used for the purification of water

Chlorine (Cl2)

Chlorine acts as a disinfectant, and hence is added in a limited amount to water to kill certain microbes. If it is overly used, then it can cause health problems.


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1

Some chemical substances are given below. From these, find out the substances required for the preparation of nitrogen and hydrogen, in the laboratory.

Sulphuric acid, hydrochloric acid, sodium nitrite, zinc, potassium permanganate, ammonium chloride, water.

 2

Find the gases for which the following statements are related.

Combustible gas obtained by the electrolysis of water

 2

Find the gases for which the following statements are related.

Gas interacting with the rhizobium bacteria in the soil

 2

Find the gases for which the following statements are related.

Gas formed by the thermal decomposition of KMnO4