Questions & Answers

Question

Answers

(A) 2,2

(B) 3,1

(C) 1,3

(D) 4,0

Answer
Verified

Let us draw the structure of $N{{O}_{3}}^{-}$ to understand the types of bond present in the ion:

We see that there are 2$\sigma $ bonds, 1$\pi $bond and 1 coordinate bond. Theoretically the coordinate bond is equivalent to a double bond but differs in terms of reactivity towards an incoming ion.

A coordinate bond also called a dative covalent bond is a type of covalent bond in which both electrons come from the same atom. Nitrogen forms a coordinate bond with Oxygen as it cannot have 5 bonds. Although 2 electrons are shared in a coordinate bond, the number of bond pairs is taken to be 1.

Hence the number of bond pairs are 4 and the number of lone pairs is 0.

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