Chemical Bonding Quizz

1. During the formation of a chemical bond between two atoms:

Only forces of repulsion are operative

Forces of attraction and repulsion forces, both are operative

Forces are not involved

Only forces of attraction are operative

Question 1 of 20

2. Who discovered the octet rule?

Langmuir

Debye

Boyle

Kossel and Lewis

Question 2 of 20

3. The Lewis structure of H2S is:

1. H:S:H

2. H.S.H

3.

4. H:S.H

Question 3 of 20

4. A CO₂ molecule contains:

Two sigma and two pi bonds

Four sigma bonds

Three sigma and one pi bond

Four pi bonds

Question 4 of 20

5. Which one of them is an odd-electron molecule?

BCl₃

SF₆

CO₂

Question 5 of 20

6. According to the Lewis symbols, the nucleus as well as the electrons in the inner shell of an element is represented by:

The symbol of the element

The number of dots on the symbol

Atomic mass

Atomic number

Question 6 of 20

7. For the formation of covalent bond the difference in the value of electro negativities should be:

Less than 2.7

Equal to 2.7

More than 1.7

Equal to or less than 1.7

Question 7 of 20

8. Select the molecule in which the central atom has incomplete octet.

NF₃

BeH₂

H₂O

CO₂

Question 8 of 20

9. Among the following compounds octet rule is not obeyed by:

PCl₃

SF₆

SO₃

SO₂

Question 9 of 20

10. The correct Lewis dot structure for BeF₂ molecule is:

1. F.Be.F

2.

3. F: Be: F4. F.Be: F

Question 10 of 20

11. The number of dots in the Lewis symbol represents:

The number of valence electrons present in the atom

Atomic mass of the element

Atomic number of the element

The electronic configuration of the atom

Question 11 of 20

12. According to Lewis symbol, the valency of N is:

Question 12 of 20

13. The formal charge on oxygen which is single bonded in ozone is:

-1

-2

Question 13 of 20

14. The formation of a chemical bond is accompanied by:

Sometimes increase and sometimes decrease in energy

Decrease in energy

Increase in energy

Neither increase nor decrease in energy

Question 14 of 20

15. Identify an example of covalent solid:

Sodium chloride

Silicon carbide

Calcium chloride

Methane

Question 15 of 20

16. Covalent compounds are soluble in:

Polar solvents

Non-polar solvents

Concentrated acids

All solvents

Question 16 of 20

17. A force which binds atoms of same or different elements by mutual sharing of electrons is called:

Covalent bond

Co-ordinate bond

Hydrogen bond

Ionic bond

Question 17 of 20

18. Which one of the following statement is not true for octet rule?

It does not explain relative stability of molecules.

It is useful for understanding structures of most of organic compounds.

It is based upon the chemical inertness of noble gases.

It accounts for the shape of molecules.

Question 18 of 20

19. Among the following molecules octet rule is not obeyed by:

OF₂

CO₂

PCl₃

ClF₃

Question 19 of 20

20. The number of electrons present in the valence shell of the central atom of super octet molecules is:

Six

More than eight

Eight

Two

Question 20 of 20