Atomic structure and bonding - Jamb Chemistry Past Questions and Answers

Question 11:

• JAMB 1978

Elements P, Q, R, S have 6, 11, 15, 17 electrons respectively, therefore,

A. P will form an electrovalent bond with R
B. Q will form a covalent bond with S
C. R will form an electrovalent bond with S
D. Q will form an electrovalent bond with S
E. Q will form a covalent bond with R

Question 12:

• 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 13:

• JAMB 1978

The nucleus of an atom contains

A. Protons only
B. Neurons only
C. Protons and electrons
D. Neutrons and electrons
E. Protons and neutrons

Question 14:

• JAMB 1978

If excess zinc is added to a bluish green solution of copper (II) sulphate, and the excess zinc filtered off after completion of reaction, a colourless solution is obtained because

A. Both zinc and copper are metals
B. The sulphate radical and the zinc ion are divalent
C. Zinc is more electropositive than copper
D. Both zinc and copper form depositive ions in solution
E. Zinc is a reducing agent

Question 15:

• JAMB 1978

Five compounds R,T,W,X and Y form the following compounds: a basic hydride R.H, an acidic hydride YH, atmospheric oxide W₂O₃, XO₂. which of the elements is an alkali

A. R
B. T
C. W
D. X
E. Y