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Borax

Lewis acid

Question

Lewis acid

A

Presence of

H

atom is necessary

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B

Is a electron pair donor

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C

Always a proton donor

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D

Is a electron pair acceptor

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Solution

The correct option is D Is a electron pair acceptor
$Lewis acids accept an electron pair.$ Lewis Acids are electrophilic meaning that they are electron attracting. When bonding with a base the acid uses its lowest unoccupied molecular orbital or LUMO.

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Similar questions

I_{2} + I^{-} ⟶ I_{3}^{-}

In above reaction,

I_{2}

is Lewis base. Reason: Electron pair acceptor is Lewis base.

Q. Assertion :All Bronsted bases are Lewis bases. Reason: A species that accepts a proton necessarily should donate a lone pair of electrons.

Q. By the following method you can predict the geometrical shape of species with only one central atom, without first drawing the Lewis structure :
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\pm

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Number of bond electron pairs = number of atoms - 1
Number of electron pairs around central atom = total number of electron pairs - 3 [number terminal atoms (except H)]
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