question_answer

Which one of the following species has plane triangular shape? [AIPMT 2014]

A)  \[{{N}_{3}}\]          

B)  \[NO_{3}^{-}\]

C)  \[N{{O}_{2}}\]           

D)  \[C{{O}_{2}}\]

Correct Answer: B

Solution :

Species with \[s{{p}^{2}}\] hybridisation are plane triangular in shape. Among the given species \[NO_{3}^{-}\] is \[s{{p}^{2}}\] hybridised with no lone pair of electrons on central atom, N. Whereas,\[{{N}_{3}},NO_{2}^{-}\] and \[C{{O}_{2}}\] are sp hybridised with a linear shape.