Q.

The cyanide ion, CNand N2 are isoelectronic. But in contrast to CN, N2 is chemically inert because of

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a

low bond energy

b

presence of more number of electrons in bonding orbitals

c

unsymmetrical electron distribution

d

absence of bond polarity

answer is B.

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Detailed Solution

In N2, there are two N atoms (symmetrical atoms) that are bonded with each other through one sigma bond and two pi bonds. As there is no polarity in N2, hence it is inert and non-reactive.

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The cyanide ion, CN– and N2 are isoelectronic. But in contrast to CN–, N2 is chemically inert because of