Dipole-induced dipole interactions are present in which of the following pairs?

1. H₂O and alcohol                       

2. Cl₂ and CCl₄

3. HCl and He atoms                     

4. SiF₄ and He atoms

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

1. CO₂

2. H₂O

3. SO₂

4. NO₂

Which one of he following pairs is isostructural (i.e., having the same shape and

hybridization)?

1. [BCl₃ and BrCl₃]

2. [NH₃ and ${\mathrm{NO}}_3^{-}$]

3. [NF₃ and BF₃]

4. [${\mathrm{BF}}_4^{-}$ and ${\mathrm{NH}}_4^{+}$]

Which of the following species contains three bond pairs and one lone pair around the

central atom?

1. H₂O                           

2. BF₃

3. ${\mathrm{NH}}_2^{-}$                           

4. PCl₃

The pair of species with the same bond order is:

1. ${\mathrm{O}}_2^{2-}$, B₂

2. ${\mathrm{O}}_2^{+}$, NO⁺

3. NO, CO

4. N₂, O₂

Considering the state of hybridisation of carbon atoms, find out the molecule among the

following which is linear.

1. HC≡CH

2. CH₂ = CH—CH₂—C = CH

3. CH₃ — CH₂ — CH₂ — CH₃

4. CH₃—CH = CH—CH₃

The correct order of increasing bond length of 

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

1. C-C<C=C<C-O<C-H

2. C-O<C-H<C-C<C=C

3. C-H<C-O<C-C<C=C

4. C-H<C=C<C-O<C-C

Which of the following compounds has the lowest melting point?

1. CaBr₂

2. CaI₂

3. CaF₂

4. CaCl₂

Which of the following has the minimum bond length?

1. ^{${\mathrm{O}}_2^{-}$}

2. ${\mathrm{O}}_2^{2-}$

3. O₂

4. ^{${\mathrm{O}}_2^{+}$}

In which of the following pairs of molecules/ions, the central atoms have \(\mathrm{sp}^2\) hybridisation?