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Assertion: Aquated copper(I) cation unde...

Assertion: Aquated copper(I) cation undergoes disproportionation as:
`2Cu^(+)(aq) to Cu^(2+)(aq)+Cu`
Reason: Hydration energy of `Cu^(2+)` is higher than that of `Cu^(+)` which compensates second ionisation energy of Cu.

A

If both assertion and reason are true and the reason is the correct explanation of assertion

B

If both assertion and reason are true and the reason is not the correct explanation of assertion

C

If assertion is false but reason is true

D

If assertion is true but the reason is false

Text Solution

Verified by Experts

The correct Answer is:
A
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Aqurated copper (I) catin undergoes disproportionation as 2Cu^(+)(aq) rarr Cu^(2+) (aq) + Cu , because

Statement-1: Many copper (I) compound are unstable in aqueous solution and undergo disproportionation. Statement-2: Cu^(2+) I mre stable than Cu^(+) because of much more negative Delta_(hyd)H^(@) of Cu^(2+) than Cu^(+) , which more than compensates for seconds ionisation enthalpy.

The reaction Co(s) + Cu^(2+)(aq) rarr Co^(2+)(aq) + Cu(s) is-

Why Cr and Cu have abnormally higher 2nd ionisation energy

Why Cr and Cu have abnormally higher 2nd ionisation energy?

The unique behaviour of CU, having a positive E^(@) (reduction potential) accounts for its inability to liberate H_(2) from acids,. Only oxidising acids (nitric acid and hot concentrated sulphuric acid) react with Cu. The high energy of transform Cu(s) to Cu^(2+)(aq.) is not balanced by its hydration enthalpy. On the other hand, All Cu(II) halides are known except iodide. in this case, Cu^(2+) oxidises I^(-) to I_(2) : 2Cu^(2+)+4I^(-) to 2CuI(s)+I_(2) However, copper (I) compounds are unstable in aqueous solution annd undergo disproportionation. 2Cu^(+)(aq.)toCu^(2+)(aq.)+Cu The stability of Cu^(2+)(aq.) rather than Cu^(+)(aq) is due to the much more negative Delta_(Hyd) of Cu^(2+)(aq.) than Cu^(+)(aq.) Q. Select the correct chemical change:

The unique behaviour of CU, having a positive E^(@) (reduction potential) accounts for its inability to liberate H_(2) from acids,. Only oxidising acids (nitric acid and hot concentrated sulphuric acid) react with Cu. The high energy of transform Cu(s) to Cu^(2+)(aq.) is not balanced by its hydration enthalpy. On the other hand, All Cu(II) halides are known except iodide. in this case, Cu^(2+) oxidises I^(-) to I_(2) : 2Cu^(2+)+4I^(-) to 2CuI(s)+I_(2) However, copper (I) compounds are unstable in aqueous solution annd undergo disproportionation. 2Cu^(+)(aq.)toCu^(2+)(aq.)+Cu The stability of Cu^(2+)(aq.) rather than Cu^(+)(aq) is due to the much more negative Delta_(Hyd) of Cu^(2+)(aq.) than Cu^(+)(aq.) Q. Consider the following transformation: CuSO_(4)(aq.)+KI(excess)to product Select the correct statement:

Write Nernst equation for the following cell reaction : Zn(s) | Zn^(2+)(aq)|| Cu^(2+)(aq) | Cu(s)

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