The number of sigma bonds in P₄O₁₀ is 

1. 6

2. 16

3. 20

4. 7

Among the following iso-structural compounds, the one that has the highest lattice energy is: 

1. LiCl

2. MgO

3. NaCl

4. LiF

A sbonded molecule MX₃ is T-shaped. The number of non-bonding pairs of electrons is :

1. 0

2. 2

3. 1

4. Can be predicted only if atomic number of M is known,

In a chemical change from ${\mathrm{PCl}}_3 \stackrel{ }{\to }{\mathrm{PCl}}_5$, the hybrid state of P changes from:
1. sp² to sp³
2. sp³ to sp²
3. sp³ to sp³d
4. sp³ to dsp²

The geometrical arrangement and shape of ${\mathrm{I}}_3^{-}$ are respectively

1. Trigonal bipyramidal geometry, linear shape

2. Hexagonal structure, linear shape

3. Triangular planar geometry, triangular shape

4. Tetrahedral geometry, pyramidal shape

Mark the incorrect order of the bond angle:

1. NH₃ > NF₃

2. NF₃ <  PF₃

3. NH₃ > PH₃

4. NH₃ > H₂O

Which molecules/ions are most paramagnetic?

1. B₂

2. C₂

3. ${\mathrm{O}}_2^{+}$

4. ${\mathrm{O}}_2^{-}$

In which case observed dipole moment is greater than theoretical dipole moment?

1.

2.

3.

4.

Which has linear shape but not sp hibridisation ?

1. ${\mathrm{XeF}}_2$

2. ${\mathrm{I}}_3^{-}$

3. ${\mathrm{CO}}_2$

4. Both 1 and 2

Which has highest bond energy ?

1. CO

2. CO⁺

3. N₂

4. ${\mathrm{N}}_2^{+}$