Q.

Lightest element of which group has highest electron affinity in its group :

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a

group 1

b

group 14

c

group 15

d

group 16

answer is A.

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Detailed Solution

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Group-1 lightest element H and has highest electron affinity'
Group15,16,17 lightest element are N,O,F has less E.A. than P,S, Cl respectively.

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Lightest element of which group has highest electron affinity in its group :