1.

Assertion (A) : All the noble gases have ns^(2)np^(6) electronic configuration in their valence shell. Reason (R) : Atomic radii increase down with increase in atomic number.

Answer»

Both ASSERTION (A) and Reason (R) are correct STATEMENTS, and Reason (R) is the correct EXPLANATION of the Assertion (A)
Both Assertion (A) and RENSON (R) are correct statements, but Reason (R) is not the correct explanation of the Assertion (A)
Assertion (A) is correct, but Reason (R) is INCORRECT statement.
Assertion (A) is incorrect, but Reason (R) is correct statement.

Answer :D


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