An element X is placed in group IA of the periodic table because it forms:

1. An oxide which is acid

2. A volatile chloride having formula XCl₂

3. An ionic chloride having formula XCl

4. An insoluble chloride XCl₄

The dielectric constant of H₂O is 80. The electrostatic force of attraction between Na⁺ and Cl^- will be

1. reduced to $\frac{1}{40}$ in water than in air

2. reduced to $\frac{1}{80}$ in water than in air

3. will be increased to 80 in water than in air

4. will remain unchanged

Which pair of atom form strongest ionic bond?

(1) Al and As

(2) Al and N

(3) Al and Se

(4) AL and O

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

A Compound with maximum ionic character is formed from:

The crystal lattice of electrovalent compound is composed of :

1. Atoms

2. Molecules

3. Oppositely charged ions

4. Both molecules and ions

Ions are formed from neutral atoms by-

1. Loss of electrons

2. Gain of electrons

3. Sharing of electrons

4. Loss and gain of electrons

The decreasing order of ionic character of the N-H, F-H, C-H, and O-H, is :  

The correct increasing order of ionic character of the following molecule is:
 LiF, K₂O, N₂, SO₂, ClF₃ 

1. N₂ < SO₂ < ClF₃ < K₂O < LiF

2. N₂ > SO₂ > ClF₃ > K₂O < LiF

3. N₂ > SO₂ > K₂O > ClF₃ > LiF

4. LiF > K₂O < ClF₃ > SO₂ > N₂

Which of the following factors are favourable for the formation of an ionic bond?