NEETChemistryCoordination Compounds
Why precipitate of copper sulphide is not obtained when H 2 S(g) is passed through K 2 [Cu(CN) 4 ] solution?
Options
- AH 2 S(g) does not react with copper sulphate in solution.
- Bbecause K 2 [Cu(CN) 4 ] is a very stable complex which does not ionise to give Cu 2+ ions when added to water
- CCopper sulphate is a strong reducing agent and prevents the formation of copper sulphide.
- DThe concentration of H 2 S(g) is insufficient to form a precipitate with copper sulphate.
Correct answer
B. because K 2 [Cu(CN) 4 ] is a very stable complex which does not ionise to give Cu 2+ ions when added to water
Step-by-step solution
Correct Option is : (B) because K 2 [Cu(CN) 4 ] is a very stable complex which does not ionise to give Cu 2+ ions when added to water