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Preparations and Uses of Caustic Soda

A certain met...

Question

A certain metal $(A)$ is boiled in dilute $H N O_{3}$ to give a salt $(B)$ and an oxide of nitrogen $(C)$ . An aqueous solution of $(B)$ with brine gives a precipitate $(D)$ which is soluble in $N H_{4} O H$ . On adding aqueous solution of $(B)$ to hypo solution, a white precipitate $(E)$ is obtained. $(E)$ turns black on standing.

Identify $(D)$ and $(E)$ .

(D) - A g C l

(E) - A g_{2} S_{2} O_{3}

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(D) - A g N O_{3}

(E) - A g_{2} S_{2} O_{3}

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(D) - A g C l_{2}

(E) - A g_{2} S_{2} O_{3}

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(D) - A g C l

(E) - A g_{2} S O_{3}

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Solution

The correct option is A $(D) - A g C l$ $(E) - A g_{2} S_{2} O_{3}$
Option (A) is correct.
$A g (A) + d i l . H N O_{3} ⟶ A g N O_{3} (B) + N O (C) + H_{2} O$

$A g N O_{3} + N a C l ⟶ A g C l (D) + N a N O_{3}$

$A g C l + N H_{4} O H ⟶ A g (N H_{3})_{2} C l (s o l u b l e c o m p l e x)$

$A g N O_{3} + N a_{2} S_{2} O_{3} ⟶ A g_{2} S_{2} O_{3} (E)$

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Similar questions

Q. A certain metal (A) is boiled in dilute nitric acid to give a salt (B) and an oxide of nitrogen (C). An aqueous solution of (B) with brine gives a precipitate (D) which is soluble in ammonium hydroxide. On adding aqueous solution of (B) to hypo solution, a white precipitate (E) is obtained. (E) on standing turns to a black compound.Compound (A) to (F) are identified as:

(A) :

A g

; (B) :

A g N O_{3}

, (C) :

N O_{2}

, (D) :

A g C l

, (E) :

A g_{2} S_{2} O_{3}

and (F) :

A g_{2} S

If true enter 1, else enter 0.

Q. A black coloured compound

(A)

on reaction with dilute

H_{2} S O_{4}

gives a gas

(B)

which on passing in a solution of an acid

(C)

gives a white turbidity

(D)

. Gas

(B)

when passed in an acidified solution of a compound

(E)

gives a precipitate

(F)

soluble in dil.

H N O_{3}

. After boiling this solution when an excess of

N H_{4} O H

is added, a blue coloured compound

(G)

is formed. To this solution on addition of acetic acid and aqueous

K_{4} [F e (C N)_{6}]

a chocolate precipitate

(H)

is obtained. On addition of an aqueous soluion of

B a C l_{2}

to an aqueous solution of

(E)

, a white precipitate insoluble in

H N O_{3}

is obtained. Identify

(G)

and

(H)

Q. A black mineral (A) is soluble in

N a C l

solution forming (B). On adding

Z n

into (B), metal (C) is formed. Metal (C) on boiling with

{H N O}_{3}

forms (D) which gives white ppt (E) with

N a C l

soluble in

{N H}_{3}

solution. (A) can be obtained when (D) reacts with hypo. (A) to (E) are
(A) :

{A g}_{2} S

(B) :

N a [{A g (C N)}_{2}]

A g

(D) :

{A g N O}_{3}

(E) :

A g C l

.
If true enter 1, else enter 0.

A black colored compound (A) on reaction with dilute

H_{2} S O_{4}

gives a gas (B) which on passing in a solution of acid (C) gives white turbidity (D). Gas (B) when placed in an acidified solution of a compound (E) gives a precipitate (F) soluble in dilute

H N O_{3} .

After boiling this solution, when an excess of

N H_{4} O H

is added, blue colored compound (G) is formed. To this solution on addition of

C H_{3} C O O H

and aqueous

K_{4} [F e (C N)_{6}]

, a chocolate precipitate (H) is obtained. On the addition of an aqueous solution of

B a C l_{2}

to an aqueous solution of E, a white ppt insoluble in

H N O_{3}

is obtained.

Identify B.

Q. Colourless solution of (A) gives white precipitate (B) with

A g N O_{3}

solution, soluble in aq.

N H_{3}

. (A) also gives white precipiatete (C) with NaOH soluble in excess of it forming (D). (D) gives white precipiate (E) with

H_{2} S

.(A), (B), (C), (D) and (E) are as follows.

(A) :

Z n C l_{2}

(B) :

A g C l

Z n (O H)_{2}

(D) :

N a_{2} Z n O_{2}

(E) :

Z n S

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The correct option is A (D)−AgCl (E)−Ag2S2O3Option (A) is correct.Ag(A)+dil.HNO3⟶AgNO3(B)+NO(C)+H2OAgNO3+NaCl⟶AgCl(D)+NaNO3AgCl+NH4OH⟶Ag(NH3)2Cl(solublecomplex)AgNO3+Na2S2O3⟶Ag2S2O3(E)