Statement-1: In a period, noble gas has largest atomic radius.
Statement-2: In case of noble gases van der Waals' radius is defined and there is much inter electronic repulsions.

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Statement-1 is False, Statement-2 is True.

Statement-1 is True, Statement-2 is False.

Statement-1 is True, Statement-2 is True; Statement-2 is a correct explanation for Statement-1.

Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-1.

answer is A.

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Detailed Solution

Because their valence shell electron configuration is totally filled, or ${ns}^{2} {np}^{6}$ , noble gases exhibit the strongest inter-electronic repulsions.

$r_{vanderWall's} > r_{metallic} > r_{covalent} .$

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