Chemistry 2000 WAEC Past Questions

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A colourless, odourless liquid T, gives effervesce with sodium trioxocarbonate (IV) and a white precipitate with silver trioxonitrate (V) solution T is most probably

A. sodium chloride soluttion
B. barium chloride solution
C. dilute trioxonitrate (V) acid
D. dilute hydrochloric acid

View Answer & Discuss (6) WAEC 2000

When sodium hydroxide solution is added to a solution of zinc salt, the white precipitate fromed redissolves in excess sodium hydroxide because

A. sodium is more reactive than zinc
B. sodium hydroxide is a strong alkali
C. zinc hydroxide is amphoteric
D. zinc hydroxide is unstable

View Answer & Discuss WAEC 2000

Which of the following on burning in air contributes to acid rain?

A. Sulphur
B. Magnesium
C. Aluminium
D. Zinc

View Answer & Discuss (1) WAEC 2000

If 20 cm³ of distilled water is added to 80 cm³ of 0.50 mol dm^-3 hydrochloric acid, the concentration of the acid will change to

A. 20 mol dm^-3
B. 0.40 mol dm^-3
C. 2.00 mol dm^-3
D. 5.00 mol dm ^-3

View Answer & Discuss (10) WAEC 2000

Biotechnology is applied in the following except

A. baking industry
B. wine production
C. production of antibiotics
D. manufacture of soap

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