The angular shape of ozone molecule (O₃) consists of 

(a) 1 sigma and 2 pi-bonds

(b) 2 sigma and 2 pi-bonds

(c) 1 sigma and 1 pi-bonds

(d) 2 sigma and 1 pi-bonds

The correct order of increasing bond angles in the following species is

(a)Cl₂O < ClO₂ < ${\mathrm{ClO}}_2^{-}$

(b) ClO₂ < Cl₂O < ${\mathrm{ClO}}_2^{-}$

(c) Cl₂O < ${\mathrm{ClO}}_2^{-}$ < ClO₂  

(d) ${\mathrm{ClO}}_2^{-}$ < ClO₂ < Cl₂O 

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) $d_{x^2-y2}, s, p_x, p_y, p_z$

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 increasing 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