NEET UG CHEMISTRY MCQ: 13 TH GROUP ELEMENTS (P-BLOCK)

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The correct Lewis acid order for boron halides is:

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Correct option: C

\mathrm{B}{\mathrm{I}_3} > \mathrm{BB}{\mathrm{r}_3} > \mathrm{BC}{\mathrm{l}_3} > \mathrm{B}{\mathrm{F}_3}

Option C (

\mathrm{B}{\mathrm{I}_3} > \mathrm{BB}{\mathrm{r}_3} > \mathrm{BC}{\mathrm{l}_3} > \mathrm{B}{\mathrm{F}_3}

) is correct because the Lewis acidity increases as the backbonding from the halide to boron decreases, which is related to the size and electronegativity of the halide.

More Questions from 13 TH GROUP ELEMENTS (P-BLOCK)

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The hardest compound of boron is: Which does not show inert pair effect? Which one of the following does not exist in the free state On strong heating of

{H}_3 {PO}_4

and

{H}_3 {BO}_3

, sum of oxidation number of

{P}\, \& {~B}

in the final product obtained is Compound ‘X’ reacts with

N{H_3}

to 473 K give another compound ‘Y’. X can be prepared by heating

B{F_3}

with sodium hydride. The compound ‘Y’ is represented by the formula Assertion: Electronegativity first increases from B to Al and then decreases from Al to

\mathrm{TI}

.

Reason: Due to poor shielding by inner

\mathrm{d}

and

\mathrm{f}

electrons.