Which of the following pair of elements can form an ionic compound?

1.	\(\mathrm{Na}\) and \(\mathrm{Ca}\)	2.	\(\mathrm{K}\) and \(O_2\)
3.	\(O_2\) and \(Cl_2\)	4.	\(Al\) and \(I_2\)

The type of molecular forces of attraction present in the following compound is:

The species showing $p\pi$-$d\pi$  overlapping is :

1. $N{O_3}^{-}$

2. $P{O_4}^{3-}$

3. $C{O_3}^{2-}$

4. $N{O_2}^{-}$

Which of the following interaction lies in the range of 8 - 42 kJ/mol?

1. ${\mathrm{H}}_2...{\mathrm{H}}_2\mathrm{O}$                               

2. HCl...HCI

3. ${\mathrm{H}}_2\mathrm{O}$...HF                                 

4. all

The number of antibonding electrons pairs in ${O_2}^{2-}$ on the basis of MO theory are:

(1) 4

(2) 3

(3) 2

(4) 5

If ${\mathrm{CdI}}_2$ is pink in colour, the ${\mathrm{CdCl}}_2$ will be '.............' coloured.

(1) yellow         

(2) red                 

(3) blue                   

(4) cannot be predicted

Which are true statements among the following?

(1) $P{H}_5$ and $BiC{l}_5$ does not exist 

(2) $p\pi$-$d\pi$ bonds are present in $S{O}_2$ 

(3) Electrons travel with speed of light 

(4) $Se{F}_4$ and $C{H}_4$ has same charge on central atom

(5) ${I_3}^{+}$ has bent geometry 

(a) 1,3 

(b) 1,2,5 

(c) 1,3,5

(d) 1,2,4 

In which molecule all atoms are coplanar?

1. $C{H}_4$

2. $B{F}_3$

3. $P{F}_3$

4. $N{H}_3$

Among the following which is paramagnetic?

1. \(\text{Cl}_2 \text{O}_6\)
2. \(\text{Cl}_2 \text{O}_7\)
3. \(\text{Cl}_2 \text{O}\)
4. \(\text{ClO}_2\)

The correct statement among the following for a compound having a higher dipole moment is-