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Q.

The covalent and van der waals radii of chlorine respectively are

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a

1.80Å & 0.99Å

b

0.99Å & 1.80Å

c

1.80Å & 1.80Å

d

0.99Å & 0.99Å

answer is B.

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Detailed Solution

Van der walls radii >> covalent radius . 

Van der walls radius is measured in non-bonding condition and thus is very large.

Covalent radius is measured from covalent bond length.

The covalent bond is a strong bond and bond length is shorter in this case. Therefore covalent radius is much shorter than that of van der walls radius.

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