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

1 Hard

1 of 1

Understanding +4 | -1

Which of the following elements does not exist in aqueous medium, as species like tetrahedral

\left[M(\mathrm{OH})_4\right]^{-}

and octahedral

\left[M\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}

View answer and explanation

Correct option: A

Boron

Option A (Boron) is correct because boron, due to its small size and high charge density, does not form stable octahedral complexes in aqueous solution.

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

Practice All Chapter MCQs →

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.