Hey aspirant,

NO3 - is plane traingular shaped. NO 3 - is sp 2 hybridized with no lone pair of electrons on the central Nitrogen atom. sp2 hybridized species are plane triangular in shape.

The other options given which are N3, NO2-, CO2 are sp hybridized amd thus has a linear shape.

Hope this helps,

All the best!

Hi Aspirant

NO3- , nitrate ion has plane triangular shape

Species with sp2 hybridisation are plane triangular.

Among the given species NO3- si sp2 hybridised with no lone pair if electron on central pair.

And N3, NO2- and CO2 are sp hybridised with linear shape.

Hope this helps!