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Q.

Given below are two statements one is labelled as Assertion(A) and other is Reason(R)
Assertion(A) : Fluorine has less electron gain enthalpy than chlorine.
Reason(R) : Fluorine has small size and inter electronic repulsions.   
In light of the above statements choose the correct answer from the options given below
 

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a

Both (A) and (R) are true and (R) is the correct explanation of (A)  

b

Both (A) and (R) are false 

c

Both (A) and (R) are true and (R) is not the correct explanation of (A)      

d

(A) is true and (R) is false   

answer is A.

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Detailed Solution

The negative electron gain enthalpy of fluorine is less than that of chlorine. It is due to the small size of fluorine atom. As a result, there are strong interelectronic repulsions in the relatively small 2p orbitals of fluorine and thus, the incoming electron does not experience much attraction.

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