Q4 of 8 Page 121

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.


Sulphate: - If barium chloride is added to a sample of water containing sulphate ions then barium sulphate is formed which is insoluble in water and white precipitate is observed.


e.g. Na2SO4 + BaCl2→ NaCl + BaSO4


Ammonium: - When Ammonium salt is mixed with the nessler’s reagent then it forms the precipitate of mercury (II) amido-iodide which gives the orange coloured precipitate.


Chloride: - When silver nitrate solution is added to a sample of water containing chloride ions then silver chloride is formed and white curdy precipitate is observed.


e.g. AgNO3 + NaCl → AgCl + NaNO3


Nitrate: - When ferrous sulphate and sulphuric acid is added to the sample of salt and if brown ring is observed in the test tube then it confirms the presence of nitrate ions.


More from this chapter

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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.

 3

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.

 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.

 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.