SATHEE: Qualitative Analysis - Result Question 49

Qualitative Analysis - Result Question 49

####52. A salt mixture consists of a yellow solid $(A)$ and a colourless solid $(B)$ . The aqueous solution of the mixture

(i) On passing $H_{2} S$ , we get a black precipitate of $(C)$ , which dissolves only in aqua-regia. On extraction and reaction with $S n C l_{2}$ a greyish white precipitate is obtained.

(ii) On treatment with ammonium hydroxide a reddish brown precipitate $(D)$ is obtained.

The sodium extract of the solution gives the following tests:

(i) On reaction with $A g N O_{3}$ it gives a yellow precipitate which is insoluble in $N H_{3}$ .

(ii) On shaking with $F e C l_{3}$ and $C C l_{4}$ a violet colouration in $C C l_{4}$ layer is obtained. Mixture on performing flame test gives lilac colour. Identify the compounds $(A), (B), (C)$ and $(D)$ .

(2003)

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Solution:

$\underset{Mixture}{\underset{⏟}{A + B}} ⟶$ lilac colour in flame

(i) $\underset{Mixture}{\underset{⏟}{A + B}} \overset{H_{2} S}{\to} \underset{Black}{C ↓}$

$C \to_{in aqua-regia}^{Soluble}$ Soluble $\overset{Evaporation}{\to}$ Residue

$\overset{S n C l_{2}}{\to}$ Greyish black $↓ (D)$

$\Rightarrow C$ is $H g S$ . (ii) $\underset{\begin{matrix} Solution of \\ mixture \end{matrix}}{\underset{⏟}{A + B}} \overset{N H_{4} O H}{\to}$ Brown ppt.

Sodium extract $\overset{A g N O_{3}}{\to}$ Yellow ppt. $\overset{N H_{3}}{\to}$ Insoluble Sodium extract of salt $\overset{C C l_{4} / F e C l_{3}}{\to}$ Violet layer $\Rightarrow A = K I$ and $B = H g I_{2}$ .

Qualitative Analysis - Result Question 49

Solution:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

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Sample Mock Test

Mentorship

NCERT Exercise Video Solution

Qualitative Analysis - Result Question 49

Solution:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

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