Q5 of 8 Page 121

Two suggestions were made when there was a leak of ammonia gas.

1. Spray water


2. Spray HCl


Which among this would you choose? Substantiate your answer.

In the first case if we spray water on the ammonia gas, the ammonia gets dissolved in water and forms the hydroxide.

NH3 + H2O → NH4+ + OH-


In the second case if we spray HCl on ammonia gas white fumes will we released which to dangerous to the people around it.


NH3 + HCl → NH4Cl


So, if there is leak of ammonia gas water should be sprayed around it.


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3

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a) During the preparation of chlorine gas, the gas is passed through concentrated sulphuric acid.


b) Wooden shelves get charred when they happen to come into contact with concentrated sulphuric acid.

 4

Some salts, the chemicals used to identify them and the results of the experiments are arranged in an incorrect way in the table below. Match them and write in the correct order.

 1

It is often said that the production of sulphuric acid is a bench mark of the industrial development of a country. Prepare a note based on the various uses of sulphuric acid.

 2

Collect more information about the industrial production and uses of strong acids like H2SO4, HCl, and HNO3. Prepare a note and present it in the class.