Chemical Bonding And Molecular Structure Ques 21
21. In $NO_3{ }^{-}$ion, number of bond pair and lone pair of electrons on nitrogen atom respectively are
[2002]
(a) 2,2
(b) 3,1
(c) 1,3
(d) 4,0
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Answer:
Correct Answer: 21.(d)
Solution:
(d)
To form $NO_3^{-}$, nitrogen uses one $p$-electron for $\pi$-bond formation and two $p$-electrons for $\sigma$-bond formation. $2 s$ electrons are used for coordinate bond formation. Thus there is no lone pair on nitrogen and four bond pairs are present.
BETA
