Jamb Chemistry 1982 Past Questions and Answers

Question 11:

• JAMB 1982

In the reaction NH3 + H+ → NH4+, the bond formed results from?

A. An electron transferred from NH₃ + H⁺
B. An electron pair donated by NH₃
C. An electron pair equally shared
D. An electron pair donated by H⁺
E. An electron tarnsferred from H⁺ to NH₃

Question 12:

• JAMB 1982

Which of the following CANNOT be obtained by fractional distillation of petroleum?

A. Ether
B. Methane
C. Butane
D. Ethene
E. Hydrogen

Question 13:

• JAMB 1982

In the reaction N₂(g) + O(g)
↔ 2NO(g) produced i an increase in the total pressure will?

A. Cause less nitrogen to be produced in the equilibrium mixture
B. Cause less nitric oxide to be produced in the equilibrium mixture
C. Cause more nitric oxide to be produced in the equilibrium mixture
D. Cause more oxygen to be produced in the equilibrium mixture
E. Have no effect

Question 14:

• JAMB 1982

In the chemical reaction A + B \(\to\) C + D, more of D is formed?

A. If the concentrated of A is reduced
B. If the concentrated of B is reduced
C. If the concentrated of C is reduced
D. If the concentration of C is increased
E. If D is continuously removed from the reaction mixture

Question 15:

• JAMB 1982

1.00 g of the oxide of metal X (atomic mass = 64) gave 0.80 g of the metal when reduced with hydrogen.
The formula of the oxide is?

A. X₂O
B. XO
C. XO₂
D. X₂O₃
E. X₃O₄