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Standard XII

Chemistry

Sulphuric Acid

An inorganic ...

Question

An inorganic white crystalline compound A has a rock salt structure. A on reaction with conc. $H_{2} S O_{4}$ and $M n O_{2}$ , evolves a pungent smelling, greenish - yellow gas B . Compound A gives white ppt. of C with $A g N O_{3}$ solution. Compounds ( A ), ( B ) and ( C) will be respectively;

N a C l, C l_{2}, A g C l

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N a B r, B r_{2}, N a B r

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N a C l, C l_{2}, A g_{2} S O_{4}

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N a_{z} C O_{3}, C O_{2}, A g_{2} C O_{3}

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Solution

The correct option is A $N a C l, C l_{2}, A g C l$
Compound A is $N a C l$ which is white crystalline solid having rock salt crystal structure. B is $C l_{2}$ a pungent smelling, greenish - yellow gas. The $A g N O_{3}$ reacts with $N a C l$ and a white milky precipitate of $A g C l$ is formed.
$2 N a C l + 2 H_{2} S O_{4} + M n O_{2} \to N a_{2} S O_{4} + M n S O_{4} + 2 H_{2} O + C l_{2}$
$A g N O_{3} + N a C l \to N a N O_{3} + A g C l$

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Similar questions

An aqueous solution of salt (A), gives white crystalline precipitate (B) with NaCl solution. The filtrate gives a black precipitate (C) when

H_{2} S

is passed through it. Compound (B) is dissolves in hot water and the solution gives a yellow precipitate (D) on treating with NaI and cooling. The compound (A) does not give any gas with dilute HCl but liberates reddish brown gas on heating.

Compound (B) is:

Q. A binary salt

(A)

on reaction with

H_{2} O

gives

B (a q)

and

C (g)

(C)

gas on passing into ammonia-cal

A g N O_{3}

gives white ppt

D (a q)

C O_{2}

gas turns

B (a q)

milky. Identify

(A), (B), (C)

and

(D)

Then the compound B is_________.

Q. An aqueous solution of salt (A) gives a white crystalline precipitate (B) with NaCl solution. The filtrate gives a black precipitate (C) when

H_{2} S

is passed through it. Compound (B) dissolves in hot water and the solution gives yellow precipitate (D) on treatment with potassium iodine and on cooling. The compound (A) does not give any gas with dilute HCl but liberates a reddish brown gas on heating. Compounds (A) to (D) are identified as:

(A) :

P b (N O_{3})_{3}

, (B) :

P b C l_{2}

P b S

, (D) :

P b I_{2}

If true enter 1, else enter 0.

Q. On mixing the aqueous solutions of compounds

(A)

and

(B)

, an insoluble compound

(C)

is produced along with another water soluble compound

(D)

. Compound

(A)

on heating gives brown

N O_{2}

gas with a cracking noise. An aqueous solution of compound

(A)

gives black ppt. with

H_{2} S

gas. Compound

(A)

also gives white ppt. with dil.

H C l

which is soluble in hot water and reappears on cooling. The hot water extract of compound

(A)

gives yellow ppt. with

K_{2} C r O_{4}

solution.

Q. Colourless salt (A) give white ppt (B) with NaOH; ppt (B) dissolves in excess of NaOH to form (C). On passing

H_{2} S

gas into (C) white ppt (D) appears. (A) also gives white ppt (E) with

A g N O_{3}

solution. What is (A)?

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An inorganic white crystalline compound A has a rock salt structure. A on reaction with conc. H2SO4 and MnO2, evolves a pungent smelling, greenish - yellow gas B . Compound A gives white ppt. of C with AgNO3 solution. Compounds ( A ), ( B ) and ( C) will be respectively;

An inorganic white crystalline compound A has a rock salt structure. A on reaction with conc. $H_{2} S O_{4}$ and $M n O_{2}$ , evolves a pungent smelling, greenish - yellow gas B . Compound A gives white ppt. of C with $A g N O_{3}$ solution. Compounds ( A ), ( B ) and ( C) will be respectively;