In order to get dry ammonia, the gas is passed through______.

sulphuric acid

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calcium chloride

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hydrogen chloride

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quick lime

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Solution

The correct option is D
quick lime

In order to get dry ammonia, the gas is passed through a drying tower containing lumps of quicklime (CaO). Other drying agents like conc. sulphuric acid, phosphorous pentaoxide and anhydrous calcium chloride are not used as ammonia being basic, reacts with them.

$N H_{3} + H_{2} S O_{4} \to (N H_{4})_{2} S O_{4} 6 N H_{3} + P_{2} O_{5} + 3 H_{2} O \to 2 (N H_{4})_{3} P O_{4} C a C I_{2} + 4 N H_{3} \to C a C I_{2} .4 N H_{3}$

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Similar questions

Choose the correct answer from the options given below:
(i) Hydrogen chloride gas being highly soluble in water is dried by:
(a) Anhydrous calcium chloride
(b) Phosphorous penta oxide
(c) Quick lime
(d) Concentrated sulphuric acid.

What would happen if
(i) Calcium oxide is used to dry hydrogen chloride.
(ii) Concentrated hydrochloric acid is kept open.
(iii) Hydrogen chloride prepared in laboratory, is passed through water, using a delivery tube.

(a) Write the equation for:
(i) the preparation of hydrogen chloride from sodium chloride and sulphuric acid. State whether the sulphuric acid should be concentrated or dilute.
(ii) the preparation of ammonia from ammonium chloride and calcium hydroxide.
(iii) the reaction of hydrogen chloride with ammonia.

Q. During the preparation of hydrogen chloride gas on a humid day, the gas is usually passed through the guard tube containing calcium chloride. The role of calcium chloride taken in the guard tube is to :

Q. During the preparation of hydrogen chloride gas on a humid day, the gas is usually passed through two guard tube containing calcium chloride. The role of calcium chloride in the guard tube is:

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