Q3 of 8 Page 121

Write down the property of sulphuric acid made use of, in the following situations?

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.

a) During the preparation of chlorine gas water are released so, sulphuric acid acts as an dehydrating agent which makes the moist chlorine gas dry.

b) Charring is the process in which the substance burns leaving behind the black spot. When the concentrated sulphuric acid falls on the wood it reacts with it till the colour of the wood turns black. This is called charring of wood.


More from this chapter

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1

Given below are the names of some chemicals.

Sodium chloride, ammonium hydroxide, nitric acid, concentrated sulphuric acid, sodium hydroxide.


a) Select and write down the substances required to prepare hydrogen chloride.


b) Suggest a method to identify hydrogen chloride gas.

 2

CaO is used as the drying agent while preparing ammonia in the laboratory. Can concentrated sulphuric acid be used as the drying agent in the place of CaO. Substantiate your answer.

 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.

 5

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.