In an octahedral structure, the pair of d orbitals involved in d²sp³-hybridisation is

(a) $d_{x^2-y^2}, d_{z^2}$

(b) $d_{xy}, d_{x^2\mathit{-}{y}^{\mathit{2}}}$

(c) $d_{{\mathrm{z}}^2}, d_{xz}$

(d) $d_{xy}, d_{yz}$

Equilateral shape has

(a) sp hybridisation

(b) sp² hybridisation

(c) sp³ hybridisation

(d) dsp² hybridisation

AsF₅ molecule is trigonal bipyramidal. The hybrid orbitals used by As-atoms for bonding are

(a) $d_{x^2-y^2}, d_{z^2}, s, p_x, p_y$

(b) $d_{xy}, s,p_x, p_y, p_z$

(c) $s, p_x, p_y, p_z, d_{xy}$

(d) $d_{z^2}, s, p_x, p_y, p_z$

Overlap of which of the following atomic orbitals would be maximum to form the strongest
covalent bond.

(1) 1s-2s (σ)

(2) 1s-2p (σ)

(3) 2p-2p (π)

(4) 2p-2p (σ)

The correct order of  bond angle order is 

(1) ${\mathrm{NH}}_2^{-}>{\mathrm{NH}}_3 >{\mathrm{NH}}_4^{+}$

(2) ${\mathrm{NH}}_4^{+}>{\mathrm{NH}}_3 >{\mathrm{NH}}_2^{-}$

(3) ${\mathrm{NH}}_3^{}>{\mathrm{NH}}_{{}_2}^{-} >{\mathrm{NH}}_4^{+}$

(4) ${\mathrm{NH}}_3^{}>{\mathrm{NH}}_4^{+} >{\mathrm{NH}}_2^{-}$

The number of sigma bonds in P₄O₁₀ is 

(1) 6

(2) 16

(3) 20

(4) 7

Which of the following leads to bonding?

Which of the following have a three dimensional network structure?

(1) SiO₂

(2) (BN)_y

(3) P₄(white)

(4) 1 and 2 both

Which one of the following molecules contain no $\mathrm{\pi }$ -bond?

(a) CO₂

(b) H₂O

(c) SO₂

(d) NO₂

The correct order of increasing bond length of 

C-H, C-O, C-C and C=C is

(a) C-C<C=C<C-O<C-H

(b) C-O<C-H<C-C<C=C

(c) C-H<C-O<C-C<C=C

(d) C-H<C=C<C-O<C-C