Covalent Bond vs Ionic Bond

Q.

Predict the type of bonding (Electrovalent or Covalent) likely to be formed when pairs of elements having following atomic numbers combine:
(i) 3 and 7
(ii) 6 and 9
(iii) 11 and 16
(iv) 14 and 12

1. (a) (i) 3 and 7 - Electrovalent
   (ii) 6 and 9 - Electrovalent
   (iii) 11 and 16 - Electrovalent
   (iv) 14 and 12 - Covalent

2. (b) (i) 3 and 7 - Covalent
   (ii) 6 and 9 - Electrovalent
   (iii) 11 and 16 - Electrovalent
   (iv) 14 and 12 - Covalent

3. (c) (i) 3 and 7 - Covalent
   (ii) 6 and 9 - Electrovalent
   (iii) 11 and 16 - Covalent
   (iv) 14 and 12 - Electrovalent

4. (d) (i) 3 and 7 - Electrovalent
   (ii) 6 and 9 - Covalent
   (iii) 11 and 16 - Electrovalent
   (iv) 14 and 12 - Covalent

Q.

Conduction of electric current takes place in covalent compounds.

1. False

2. True

Q. Electrovalent compounds are soluble in water and insoluble in organic compounds, whereas, covalent compounds are soluble in organic solvents and insoluble in water.

1. False
2. True

Q.

Which of the following has the highest melting point?

1. Diamond

2. Na

3. Fe

4. Pb

Q.

Which of the following has the weakest bond?

1. Diamond

2. Neon (Solid)

3. KCl

4. Ice

Q.

In an ionic compound, electrons are transferred from one atom to another atom, whereas in a polar covalent compound electron pair/pairs between participating atoms are not equally shared.

1. False

2. True

Q. Which of the following compounds has the highest melting point?

1. $\text{KCl}$
2. ${\text{C}}_3{\text{H}}_7\text{OH}$
3. ${\text{CH}}_4$
4. ${\text{C}}_6{\text{H}}_5\text{COOH}$

Q. Van der Waals forces are weak intermolecular forces.

1. True
2. False

Q. Ionic bond is merely an electrostatic force of attraction between two anions.

1. True
2. False

Q. Molecular reactions involve compounds and are .

1. slow
2. fast
3. instant
4. ionic
5. covalent