SATHEE: Qualitative Analysis - Result Question 9

Qualitative Analysis - Result Question 9

####9. $C u S O_{4}$ decolourises on addition of $K C N$ , the product is

(2006, 3M)

(a) ${[C u (C N)_{4}]}^{2 -}$

(b) $C u^{2 +}$ get reduced to form ${[C u (C N)_{4}]}^{3 -}$

(d) $C u C N$

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Answer:

Correct Answer: 9. (b)

Solution:

$C u S O_{4} + 2 K C N ⟶ C u (C N)_{2} + K_{2} S O_{4}$

$\begin{aligned} \underset{Unstable}{2 C u (C N)_{2}} ⟶ 2 C u (C N) + |_{C N}^{C N} (Cyanogen) \\ C u C N + 3 K C N ⟶ 3 K^{+} + {[C u (C N)_{4}]}^{3 -} \end{aligned}$

Qualitative Analysis - Result Question 9

Answer:

Engineering Preparation

Medical Preparation

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Qualitative Analysis - Result Question 9

Answer:

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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