Silver nitrate gives a white precipitate AA with aqueous sodium thiosulphate BB- the precipitate dissolves in excess of thiosulphate- If the precipitate is heated with water- it turns black CC- and the supernatant liquid then gives a white precipitate DD with acidified barium nitrate solution- Read the above analysis report and answer the questions given below-Select correct explanation for the formation of C and D -

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Nitrogen

Silver nitrat...

Question

Silver nitrate gives a white precipitate A with aqueous sodium thiosulphate B; the precipitate dissolves in excess of thiosulphate. If the precipitate is heated with water, it turns black C, and the supernatant liquid then gives a white precipitate D with acidified barium nitrate solution. Read the above analysis report and answer the questions given below:
Select correct explanation for the formation of $C$ and $D$ :

When

B

is heated with

H_{2} O

H_{2} S

is formed which gives black ppt of

{A g}_{2} S

No worries! We‘ve got your back. Try BYJU‘S free classes today!

{A g}_{2} S

(black

C

) is precipitated alongwith

H_{2} {S O}_{4}

(in supernatant layer) which gives white ppt with

{B a ({N O}_{3})}_{2}

solution

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

{A g}_{2} {S O}_{4}

(black

C

) is precipitated alongwith

H_{2} S

which gives white ppt with

{B a ({N O}_{3})}_{2}

solution

No worries! We‘ve got your back. Try BYJU‘S free classes today!

None of the above

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A ${A g}_{2} S$ (black $C$ ) is precipitated alongwith $H_{2} {S O}_{4}$ (in supernatant layer) which gives white ppt with ${B a ({N O}_{3})}_{2}$ solution
Silver nitrate gives a white precipitate $A$ of $A g_{2} S_{2} O_{3}$ with aqueous sodium thiosulphate $B$
$2 A g N O_{3} + N a_{2} S_{2} O_{3} \to A g_{2} S_{2} O_{3} ↓ (w h i t e)$
the precipitate dissolves in excess of thiosulphate. If the precipitate is heated with water, it turns black due to formation of $C$ ( ${A g}_{2} S$ )
$A g_{2} S_{2} O_{3} w a t e r - -- \to A g_{2} S + H_{2} S O_{4}$
and the supernatant liquid then gives a white precipitate $D$ with acidified barium nitrate solution.
$H_{2} S O_{4} + B a (N O_{3})_{2} \to B a S O_{4} + 2 H N O_{3}$

Suggest Corrections

Similar questions

Q. Silver nitrate gives a white precipitate (A) with aqueous sodium thiosulphate (B); the precipitate dissolves in excess of thiosulphate. If the precipitate is heated with water., it turns black (C), and the upper layer liquid then gives a white precipitate (D) with acidified barium nitrate solution.

What is the'formula of white ppt. (A) ?

Q. An aqueous solution of a substance gives a white precipitate on treatment with dil

H C l

, which dissolved on heating. On passing

H_{2} S

in hot acidic solution a black precipitate is formed. The substance is:

{A g}_{2} S O_{4}

gives white ppt with hypo changing to black after sometime. Black ppt is of

Q. 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 a white ppt. with an ammonium carbonate solution. Ppt.

C

dissolves in dil.

H C l

and the 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.

The yellow precipitate

(D)

is:

Q. An aqueous solution of a substance gives a white precipitate on treatment with

d i l . H C l

which dissolves on heating. When

H_{2} S

is passed through the hot acidic solution, a black precipitate is obtained. The substances are not :

Join BYJU'S Learning Program