Jamb Chemistry 1986 Past Questions and Answers

Question 16:

• JAMB 1986

Which of the following metals does NOT form a stable trioxocarbonate (IV)?

A. Fe
B. Al
C. Zn
D. Pb
E. None of the options is correct

Question 17:

• JAMB 1986

Which of the following sulphides is insoluble in dilute HCl?

A. Na₂S
B. ZnS
C. CuS
D. FeS

Question 18:

• JAMB 1986

When chlorine is passed into water and subsequently exposed to sunlight, the gas evolved is?

A. HCl
B. HOCl
C. O₂
D. Cl₂O

Question 19:

• JAMB 1986

A substance Z reacts with NaOH to give salt and water only. When Z is treated with dilute HCl, a gas is evolved which gives a yellow suspension on passing into concentrated H₂SO₄. Substance Z is?

A. NaHS
B. Na₂SO₃
C. Na₂S
D. NaHSO₃

Question 20:

• JAMB 1986

Ammonia gas is normally dried with?

A. Concentrated sulphuric acid
B. Quicklime
C. Anhydrous calcium chloride
D. Magnesium sulphate