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Standard XII

Chemistry

Lead Monoxide

An acidic sol...

Question

An acidic solution of ‘X’ does not give precipitate on passing $H_{2} S$ gas. ‘X’ gives a white precipitate when $N H_{4} O H$ is added to it. The white precipitate dissolves in excess of $N a O H$
solution. Pure ‘X’ fumes in air and dense white fumes are obtained when a glass rod dipped in $N H_{4} O H$ is held in the fumes. The compound ‘X’ is:

S n C l_{2}

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Z n C l_{2}

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F e C l_{3}

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A l C l_{3}

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Solution

The correct option is D $A l C l_{3}$
since compound ‘X’ do not give any ppt with $H_{2} S$ , it cannot be $Z n C l_{2}$ or $S n C l_{2}$ .
The salt should contain chloride radical as it gives dense white fumes with $N H_{4} O H$ . The salt solution gives precipitate with $N H_{4} O H$ which is soluble in excess of $N a O H$ . Hence it is not ferric chloride. The salt should be $A l C l_{3}$ .

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Similar questions

Q. An acidic solution of ‘X’ does not give precipitate on passing

H_{2} S

gas. ‘X’ gives a white precipitate when

N H_{4} O H

is added to it. The white precipitate dissolves in excess of

N a O H

solution. Pure ‘X’ fumes in air and dense white fumes are obtained when a glass rod dipped in

N H_{4} O H

is held in the fumes. The compound ‘X’ is:

Q. An inorganic Lewis acid

(X)

fumes in moist air, and intensity of fumes increases when a rod dipped in

N H_{4} O H

is brought near to it. An acidic solution of

(X)

on addition of

N H_{4} C l

and

N H_{4} O H

gives a precipitate which dissolves in

N a O H

solution. An acidic solution of

(X)

does not give precipitate with

H_{2} S

. Hence, the compound

(X)

is :

Q. When an aqueous solution of gas

(X)

is added to

F e C l_{3}

solution, a brown precipitate is obtained which is soluble in dil.

H N O_{3}

, gas

(X)

will give white fumes with

H C l

, then gas

(X)

is :

Q. The aqueous solution of an inorganic compound (X) gives white precipitate with

N H_{4} O H

which does not dissolve in excess of

N H_{4} O H

This aqueous solution also gives white precipitate with

A g N O_{3}

and the precipitate is soluble in dilute

H N O_{3}

. Here, (X) is :

Q. An inorganic Lewis acid (X) shows the following reactions:

(i) It fumes in moist air.
(ii) The intensity of fumes increases when a rod diffed in

{N H}_{4} O H

is brought near it.
(iii) An acidic solution of (X) on addition of

{N H}_{4} C l

and

{N H}_{4} O H

gives a precipitate which dissolves in

N a O H

solution.
(iv) An acidic solution of (X) does not give precipitate with

H_{2} S

. Compound (X) is identified as

{A l C l}_{3}

If the given statement is true enter 1, else enter 0.

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