1.

Assertion A: Chemical reactivity of the element of group 18 is very less. Reason R: Their outermost shell is completely filled with electrons.

Answer»

ASSERTION A and reason R are true, and reason R is the CORRECT explanation of assertion A.
Assertion A and reason R are true, but reason R is not the correct explanation of assertion A.
Assertion A is CORRET but reason R is false.
Assertion A is false but reason R is true.

Answer :A


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