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Q.

Assertion (A) : Group 17 elements have very high negative electron gain enthalpies.

Reason (R) : Group 17 elements attain stable noble gas electronic configurations by picking up an electron.

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a

(A) and (R) both are correct but (R) is not correct explanation for (A)

b

(A) and (R) both are correct and (R) is  correct explanation for (A)

c

(A) is correct but (R) is wrong statement

d

(A) and (R) both are wrong statements

answer is C.

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Detailed Solution

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Group 17 elements have very high negative electron gain enthalpies because they stable noble gas electronic configurations by picking up an electron.

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Assertion (A) : Group 17 elements have very high negative electron gain enthalpies. Reason (R) : Group 17 elements attain stable noble gas electronic configurations by picking up an electron.