JEE CHEMISTRY MCQ: P-BLOCK ELEMENTS

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Assertion (A): As to

\mathrm{Bi}

, there is only a small increase in covalent radius.

Reason (R):

d

and/or

f

-orbitals are completely filled in heavier elements.

View answer and explanation

Correct option: A

Both

\mathrm{A}

and

\mathrm{R}

are correct;

\mathrm{R}

is the correct explanation of

A

Option A (Both

\mathrm{A}

and

\mathrm{R}

are correct;

\mathrm{R}

is the correct explanation of

A

) is correct because the small increase in covalent radius from As to Bi is due to the poor shielding effect of the filled d and f orbitals in Bi.

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