NTA Abhyas JEE Main2020Chemistryd and f Block ElementsPractice
CuSO 4 ( aq ) → H 2 S ↑ M ↓ → Excess   of   KCN N   +   O Then final product N and O are respectively.
Options
- A[ C u ( C N ) 4 ] 3 - , ( C N ) 2
- BC u C N , ( C N ) 2
- C[ C u ( C N ) 4 ] 2 - , ( C N ) 2
- DC u ( C N ) 2 , K 2 S
Correct answer
A. [ C u ( C N ) 4 ] 3 - , ( C N ) 2
Step-by-step solution
CuSO 4 ( aq ) → H 2 S 2CuS Black   ppt .   (M) → KCN   Excess [Cu(CN) 4 ] 3 − N   +   (CN) 2 O ↑