Question

Which of the following pairs have different hybridisation and same shape?
(i) $NO_3^-$ and $CO_3^{2-} $
(ii) $SO_2$ and $NH_2^-$
(iii) $XeF_2$ and $CO_2$
(iv) $H_2O$ and $NH_3$

• A. (i) and (iv)
• B. (ii) and (iv)
• C. (ii) and (iii)
• D. None of these

Answer 1

Answer: (C)

(i) $\underset{(sp^2, \text{trigonalplanar})}{NO_3^-}\,\, \underset{(sp^2, \text{trigonalplanar})}{CO_3^{2-}}$
Same hybridisation and same shape.
(ii) $\underset{(sp^2, \text{bent})}{SO_2} \,\, \underset{(sp^3, \text{bent})}{NH_2^-}$
Different hybridisation and same shape.
(iii) $\underset{(sp^3d, \text{linear})}{XeF_2} \,\,\underset{(sp, \text{linear})}{CO_2}$
Different hybridisation and same shape.
(iv) $\underset{(sp^3, \text{angular})}{H_2O} \,\, \underset{(sp^3, \text{pyramidal})}{NH_3}$
Same hybridisation and different shape