# NEET Chemistry The p-Block Elements (XII) Questions Solved

BOARD

Why does $N{O}_{2}$ dimerise?

$N{O}_{2}$ contains 7+2$×$8 i.e. 23 odd electrons. In the valence shell N has seven electrons and hence less stable. To acquire stability it dimerizes to form ${N}_{2}{O}_{4}.$

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