Chemical bonding - Jamb Chemistry Past Questions and Answers

Question 1:

• JAMB 2019

When ammonia and hydrogen ion bond together to form ammonium ion, the bond formed is called

A. Ionic bond
B. Electrovalent bond
C. Covalent bond
D. Co-ordinate bond
E. Hydrogen bond

Question 2:

• JAMB 2019

The normal boiling point of a liquid is defined as

A. The temperature at which its vapour pressure equals the atmospheric pressure
B. The temperature at which bubbles begin to form
C. The temperature at which the vapour pressure equals 1 temperature
D. The temperature at which the rate of condensation of vapour equals the rate of vaporisation of the liquid
E. The temperature at which the space above the liquid is saturated

Question 3:

• JAMB 1978

When ammonia and hydrogen ion bond together to form ammonium ion, the bond formed is called

A. Ionic bond
B. Electrovalent bond
C. Covalent bond
D. Co-ordinate bond
E. Hydrogen bond

Question 4:

• JAMB 1981

The electronic configuration of elements X and Y are X = 2, 8, 6; Y = 2, 8, 7. The bond in the compound formed by X and Y is expected to be?

A. Ionic
B. Covalent
C. Dative covalent
D. Metallic
E. None of the above

Question 5:

• JAMB 1982

Which of the following bonds exist in crystalline ammonium chloride (NH₄Cl)?

A. Ionic and covalent
B. Ionic and co-ordinate
C. Ionic covalent and co-ordinate
D. Covalent , co-ordinate and metalllic
E. Ionic, covalent and metallic