Identify A and B based on following results-Colourless salt A - dil- HCl- White ppt B soluble in hot waterIn the reaction- vinegar smell is also observed-

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Byju's Answer

Standard XII

Chemistry

Stoichiometric Calculations

Identify A ...

Question

Identify $(A)$ and $(B)$ based on following results:
Colourless salt $(A)$ + dil. $H C l \to$ White ppt $(B)$ soluble in hot water
In the reaction, vinegar smell is also observed.

(A)

P b (C H_{3} C O O)_{3}

; (B)

P b C l_{2}

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(A)

P b (C H_{3} C O O)_{2}

; (B)

P b C l_{3}

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(A)

P b (C H_{3} C O O)_{2}

; (B)

P b C l_{2}

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(A)

P b (C H_{3} C O O)_{3}

; (B)

P b C l_{3}

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Solution

The correct option is C (A) $P b (C H_{3} C O O)_{2}$ ; (B) $P b C l_{2}$
The compounds A and B are lead acetate $P b (C H_{3} C O O)_{2}$ and lead dichloride $P b C l_{2}$ .
Lead acetate reacts with dil HCl to form white ppt of lead dichloride which is soluble in hot water.
The vinegar smell is due to acetic acid which is formed in the reaction.
$P b (C H_{3} C O O)_{2} + 2 H C l \to P b C l_{2} + 2 C H_{3} C O O H$

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Similar questions

Q. Hydrated salt (A) +

B a C l_{2} ⟶

white ppt (B) insoluble in

H N O_{3}

(A) (in dil..HCl) +

H_{2} S ⟶

black ppt soluble in 50%

H N O_{3}

(A) +aq

N H_{3}

(excess)

⟶

deep blue solution (C)
(A) +microscomic salt

△ \to

green (D) when hot
(A) +Kl solution

⟶

reddish brown changing to white ppt after hypo is added.
2.495 g of (A) gave 2.33 g of (B). Here (A) is identified as

C u S O_{4} . 5 H_{2} O

.
If true enter 1, else enter 0.

Metal nitrate

(A)

on heating decomposes, leaving a residue

(B)

which goes into the solution with dil.

H C l

. The solution of

(B)

gives white ppt. with ammonium carbonate solution. Ppt.

C

dissolves in dil.

H C l

and solution is treated with potassium chromate to yellow ppt.

(D)

. Solution

V

with dil.

H_{2} S O_{4}

also gives white ppt.

(E)

insoluble in dil.

H C l

and nitric acid. Precipitate

(E)

is part of white pigment lithopone.

What is

(E)

Q. There are two colourless solutions (A) and (B), both give white ppt with

A g N O_{3}

which dissolves in

a q N H_{3}

. Also (A) on reaction with

H_{2} O

gives orange turbidity while (B) gives white turbidity. Identify (A) and (B).

Q. Colourless salt

(A) dil. HCl - ----- \to

White precipitate (B)
Here,

(A)

{P b ({N O}_{3})}_{2}

and

(B)

{P b C l}_{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.

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Identify (A) and (B) based on following results:Colourless salt(A) + dil. HCl→ White ppt(B) soluble in hot waterIn the reaction, vinegar smell is also observed.

Identify $(A)$ and $(B)$ based on following results:
Colourless salt $(A)$ + dil. $H C l \to$ White ppt $(B)$ soluble in hot water
In the reaction, vinegar smell is also observed.