Atomic structure and bonding - Jamb Chemistry Past Questions and Answers

Question 56:

• JAMB 1991

Which of the following represents the type of bonding present in ammonium chloride molecule?

A. Ionic only
B. Covalent only
C. Ionic and dative covalent
D. Dative covalent only

Question 57:

• JAMB 1991

Which of the following is arranged in order of increasing electronegativity?

A. Chlorine, aluminium, magnesium, phosphorus, sodium
B. Sodium, magnesium, aluminium, phosphorus, chlorine
C. Chlorine, phosphorus, phosphorous, aluminium, magnesium, sodium
D. Sodium, chlorine, phosphorus, magnesium, aluminium

Question 58:

• JAMB 1991

The electrons of two atoms Y and Z are arranged in shells as shown above. The bond formed between the atoms of Y and Z is

A. Ionic
B. Covalent
C. Dative
D. Metallic

Question 59:

• JAMB 1992

The nucleus of the isotope tritium, contains?

A. Two neutrons with no protons
B. One neutron and one protons
C. Two neutrons and one proton
D. Two neutrons, one proton and one electron

Question 60:

• JAMB 1992

How many lone pairs of electron are there on the central atom of the H₂O molecules?

A. 1
B. 2
C. 3
D. 4