NTA Abhyas JEE Main2020Chemistryp Block Elements (Group 15, 16, 17 & 18)Practice

Which of the following metal nitrate produces gaseous product when reacts with KCN solution?

Options

AC u ( N O 3 ) 2
BA g N O 3
CC d ( N O 3 ) 2
DP b ( N O 3 ) 2

Correct answer

A. C u ( N O 3 ) 2

Step-by-step solution

(A)2Cu(NO 3 ) 2   +   4KCN → KNO 3 + 2CuCN Redox +(CN) 2 ↑ B A g N O 3 + K C N → K N O 3 + A g C N ↓ (ppt. formation) C C d ( N O 3 ) 2 + 2 K C N → 2 K N O 3 + P b ( C N ) 2 ↓ (ppt formation) D P b ( N O 3 ) 2 + 2 K C N → 2 K N O 3 + P b ( C N ) 2 ↓ (ppt formation)

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