Chemistry 1981 JAMB Past Questions

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An element X has 127 neutrons and 82 electrons.
Its atomic number is?

A. 209
B. 105
C. 45
D. 82

View Answer & Discuss (9) JAMB 1981

When a bottle of Coca-Cola is opened, bubbles of evolve. The gas is?

A. hydrogen
B. carbon monoxide
C. carbon dioxide
D. sulphur oxide
E. chlorine

View Answer & Discuss (1) JAMB 1981

When glowing splint is inserted into the mouth of a jar containing a gas, the splint is extinguished. The gas gives a white precipitate when passing into barium hydroxide. The gas is?

A. methane
B. hydrogen chloride
C. hydrogen
D. nitrogen
E. carbondioxide

View Answer & Discuss (4) JAMB 1981

An example of a strong electrolyte is?

A. ethyl acetate
B. ethanol
C. glucose
D. sodium formate
E. formic acid

View Answer & Discuss (6) JAMB 1981

The oxidation number of manganese in KMnO₄ is?

A. +1
B. +3
C. +5
D. +7
E. +2

View Answer & Discuss (5) JAMB 1981

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