The dand fblock elements - Result Question 59
####59. Cuprous compounds such as $CuCl, CuCN$ and $CuSCN$ are the only salts stable in water due to
[1996]
(a) high hydration energy of $Cu^{+}$ions
(b) their inherent tendency to not disproportionate
(c) diamagnetic nature
(d) insolubility in water
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Solution:
- (d) Although $Cu^{2+}$ state is more stable than $Cu^{+}$, but $Cu^{+}$ion can be stabilized by formation of insoluble substances such as $CuCl, CuCN$ and $CuSCN$. $Cu^{2+}$ is more stable than $Cu^{+}$ because of its high hydration energy.
