Favourable conditions for electrovalency are:

1.	Low charge on ions, large cation, small anion.
2.	High charge on ions, small cation, large anion.
3.	High charge on ions, large cation, small anion.
4.	Low charge on ions, small cation, large anion

The correct order of the O–O bond length in ${\mathrm{O}}_2,{\mathrm{H}}_2{\mathrm{O}}_2 \mathrm{and} {\mathrm{O}}_3$ is :-

1. ${\mathrm{O}}_2>{\mathrm{O}}_3>{\mathrm{H}}_2{\mathrm{O}}_2$

2. ${\mathrm{O}}_3>{\mathrm{H}}_2{\mathrm{O}}_2>{\mathrm{O}}_2$

3. ${\mathrm{H}}_2{\mathrm{O}}_2>{\mathrm{O}}_3>{\mathrm{O}}_2$

4. ${\mathrm{H}}_2{\mathrm{O}}_2>{\mathrm{O}}_2>{\mathrm{O}}_3$

CaO and NaCl have the same crystal structure and approximately the same ionic radii. If U is the lattice energy of NaCl, the approximate lattice energy of CaO is :-

1. U/2 

2. U 

3. 2 U 

4. 4 U

Which of the following sequences represents the increasing order of the polarizing power of the cationic species?

K⁺, Ca⁺², Mg⁺², Be⁺²

1. Be⁺² < K⁺ < Ca⁺² < Mg⁺² 

2. K⁺ < Ca⁺² < Mg⁺² < Be⁺²

3. Ca⁺² < Mg⁺² < Be⁺² < K⁺ 

4. Mg⁺² < Be⁺² < K⁺ < Ca⁺²

Which of the following is the correct order of dipole moment?

1. $N{H}_3<B{F}_3<N{F}_3<H_{2}O$

2. $B{F}_3<N{F}_3<N{H}_3<H_{2}O$

3. $B{F}_3<N{H}_3<N{F}_3<H_{2}O$

4. $H_{2}O<N{F}_3<N{H}_3<B{F}_3$

The compound that does not contain an ionic bond is:

1. NaOH

2. HCl

3. K₂S

4. LiH

Which of the following is an example of super octet molecule?

1. ClF₃

2. PCl₅

3. IF₇

4. All the three

In bisulphate ion, HSO₄^-, the formal charge on S atom is

1. +6

2. +4

3. +1

4. +2

An atom of the element A has 3 electrons in its outermost shell while another atom X has 6 electrons in its outermost shell. The formula of the compound between A and X could be :

1. A₂X₃

2. AX₃

3. A₃X₂

4. A₂X

In the electronic structure of acetic acid there are

1. 16 shared and 8 unshared electrons

2. 8 shared and 16 unshared electrons

3. 12 shared and 12 unshared electrons

4. 18 shared and 6 unshared electrons