A white solid(X) on treatment with dilute HCl produces a reddish brown gas. The compound (X) gives
a pungent smelling gas (Y) on heating with NaOH soluion. (Y) turns red litmus paper blue and forms a dense
white fumes while a glass rod dipped in conc. HCl is shown over it. Then compound (X) is
(a) NH4NO3 (b) NH4NO2 (c) NaNO2 (d) NH4Br

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Solution

The compound is b- NH₄NO₂

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Similar questions

Explain why :

(a) anhydrous HCl is a poor conductor while aqueous HCl is an excellent conductor.
(b) when the stopper of a bottle full of hydrogen chloride gas is opened there are fumes in the air.
(c) a solution of hydrogen chloride in water turns blue litmus red and conducts electricity, while a solution of the same gas in toluene :
(i) has no effect on litmus, and
(ii) does not conduct electricity.
(d) thick white fumes are formed when a glass rod dipped in $N H_{4} O H$ is brought near the mouth of a bottle full of HCl gas.
(e) dry hydrogen chloride gas does not affect a dry strip of blue litmus paper but it turns red in the presence of a drop of water.

(f) hydrogen chloride gas is not collected over water.

Q. An orange coloured solid

(A)

is soluble in water and gives a gas

(B)

and green coloured solid

(C)

on heating. The compound

(A)

gives a gas

(D)

when reacts with

N a O H

and solution turns yellow. The gas

(D)

turns red litmus blue. Identify the compounds

(A)

(D)

and explain the reaction.

Ammonia is a brown coloured, pungent-smelling gas which turns moist blue litmus paper into the red colour.

Q. Match the following:

	Column A	Column B
1.	A substance that turns moist starch iodide paper blue.	A. Ammonium sulphate
2.	A compound which releases a reddish brown gas on reaction with concentrated sulphuric acid and copper turnings.	B. Lead carbonate
3.	A solution of this compound gives a dirty green precipitate with sodium hydroxide.	C. Chlorine
4.	A compound which on heating with sodium hydroxide produces a gas which forms dense white fumes with hydrogen chloride.	D. Copper nitrate
5.	A white solid which gives a yellow residue on heating.	E. Ferrous sulphate.

An aqueous solution of a salt (A) gives white precipitate (B) with sodium chloride solution. The filtrate gives a black precipitate. (C) When $H_{2} S$ is passed into it. Compound (B) dissolves in hot water and the solution gives a yellow precipitate (D) on treatment with sodium iodide. The compound (A) does not give any gas with dilute HCl but liberates a reddish brown gas on heating. Identify the compound (A) to (D).

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The compound is b- NH4NO2

The compound is b- NH₄NO₂