Jamb Chemistry 1995 Past Questions and Answers

Question 26:

• JAMB 1995

Which of the following equilibria is shifted to the right as a result of an increase in pressure?

A. H_2(g) + I_2(g) 2HI_(g)
B. 2NO_2(g) N₂O_4(g)
C. PCl_5(s) PCl_3(s) + Cl_2(g)
D. 2O_3(g) 3O_2(g)

Question 27:

• JAMB 1995

In the industrial production of hydrogen from natural gas, carbon (IV) oxide produced along with the hydrogen is removed by?

A. Washing under pressure
B. Passing the mixture into lime water
C. Using ammoniacal copper (l) chloride
D. Drying over phoshorus (V) oxide

Question 28:

• JAMB 1995

Sulphur exists in six forms in the solid state. This property is known as?

A. Isomerism
B. Allotropy
C. Isotopy
D. Isomorphism

Question 29:

• JAMB 1995

A gas that will turn orange potassium heptaoxodichromate (lV) solution to clear green is?

A. Sulphur (lV) oxide
B. Hydrogen sulphide
C. Sulphide (lV) oxide
D. Hydrogen chloride

Question 30:

• JAMB 1995

Which of the following ions will give a white precipitate with aqueous NaOH and soluble in excess of the base?

A. Ca²⁺
B. Mg²⁺
C. Zn²⁺
D. Cu²⁺