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Question

Statement 1: F atom has a less negative electron gain enthalpy than Cl atom.
Statement 2: Additional electron is repelled more efficiently by 3p electron in Cl atom than by 2p electron in F atom.

A
Both the statements are correct and statement 2 is the correct explanation of statement 1
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B
Both the statements are correct and statement 2 is not the correct explanation of statement 1
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C
Statement 1 is true and statement 2 is false
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D
None of the statements are true
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Solution

The correct option is C Statement 1 is true and statement 2 is false
The additional electron is repelled more efficiently by 2p electron in F atom than by 3p electron in Cl atom due to the smaller size of F atom (there are more inter-electronic repulsions). This is the reason why electron gain enthalpy of F is less negative than that of Cl.

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