Chemistry and Industry - Jamb Chemistry Past Questions and Answers

Question 41:

• JAMB 1988

Given the reactions (i) Fe_(s) + X(NO₃)_2(aq) → Fe(NO₃) + X_(s) (ii) H_2(g) + XO → X + H₂O_(s); X is likely to be?
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A. Copper
B. Zinc
C. Calcium
D. Lead

Question 42:

• JAMB 1988

2.25g of a sample of an oxide of copper on reduction gave 2.0g of copper. 2.50g of another oxide of copper on reduction also gave 2.0g of copper. These results are in accordance with the law of?

A. Constant composition
B. Conservation of matter
C. Multiple proportions
D. Definite proportions

Question 43:

• JAMB 1989

The catalyst used in the contact process for the manufacture of tetraoxosulphate (VI) acid is

A. Manganes (IV) oxide
B. Manganese (ll) tetraoxosulphate (VI)
C. Vanadium (V) oxide
D. Iron metal

Question 44:

• JAMB 1989

The products of the thermal decomposition of ammonium trioxonitrate (V) are

A. NO ₂ and oxygen
B. NH₃ and oxygen
C. Nitrogen and water
D. N₂O and water

Question 45:

• JAMB 1989

Vulcanization of rubber is a process by which

A. Isoprene units are joined to produce rubber
B. Rubber latex is coagulated
C. Sulphur is chemically combined in the rubber
D. Water is removed from the rubber