Jamb Chemistry 2001 Past Questions and Answers

Question 16:

• JAMB 2001

Environmental pollution is worsened by the release from automobile exhausts of

A. Water vapour
B. Steam
C. Smoke
D. Heavy metals

Question 17:

• JAMB 2001

The chemical used for coagulation in water purification is

A. Aluminium tetraoxosulphate (VI)
B. Copper tetraoxosulphate (VI)
C. Sodium tetraoxosulphate (VI)
D. Calcium tetraoxosulphate (VI)

Question 18:

• JAMB 2001

Phosphorus is stored under water to prevent it from

A. Dehydrating
B. Becoming inert
C. Smelling
D. Catching fire

Question 19:

• JAMB 2001

In which of the following reactions does reduction takes place

A. Fe²⁺ - e^- → Fe³⁺
B. 2O^2- →O₂ + 4e^-
C. Cr – 2e^- → Cr²⁺
D. 2H⁺ + 2e^- → H₂

Question 20:

• JAMB 2001

P_(g) + Q_(g) ↔ 3R_(s) + S_(g) ΔH is negative
Which of the following will increase the yield of R?

A. Using a larger close vessel
B. Increasing the temperature
C. Removing some S
D. Adding a positive catalyst