Past Questions And Answers
The landform marked S is a
- A. Col
- B. Spur
- C. Plateau
- D. Knoll
If he had entered the room, I ..........him
- A. saw
- B. had seen
- C. would have seen
- D. may see
(a)(i) List two physical properties used as criteria for purity of substances
(ii) describe how you would prepare a pure, dry sample of sodium chloride crystals by a neutralization reaction, using bench reagents.
(iii) Give two other general methods for preparing soluble salts.
(b) Explain the following observations:
(i) a sheet of iron placed in dilute copper (II) tetraoxosulphate (VI) solution reddish brown;
(ii) the white gelatinous precipitate formed when a few drops of sodium hydroxide solution are added to a solution of aluminium salt dissolves in excess alkali;
(iii) the pale green prepared iron(II) chloride solution changes to brown on bubbling chlorine gas through it.
(iv) Write a balanced equation for the reaction of dilute hydrochloric acid with marble. List two industrial process in which limestone is used as a raw material.
View Discussion (0)WAEC 1990 THEORYBy comparism, a state is?
- A. less permanent than a government
- B. more permanent than a government
- C. more changeable than a government
- D. equally permanent with a government
The table below shows the temperature and rainfall distribution of station Z. Study and use it to answer questions 11 to 13.
What's the range?
- A. 32 °C
- B. 10 °C
- C. 22 °C
- D. 54 °C
Newspaper was introduced in Nigeria in _____
- A. 1922
- B. 1923
- C. 1924
- D. 1925
A gas that turns a filter paper previously soaked in lead ethanoate solution black is?
- A. hyrogen chloride
- B. hydrogen sulphide
- C. sulphur (IV) oxide
- D. sulphur (VI) oxide
In many areas, limestone rocks are resistant to water erosion on their surfaces and form uplands because of their
- A. coarse and resistant minerals
- B. low porosity and permeability
- C. dense and armophous structure
- D. joints and pervious nature
Maize is a very important crop because apart from serving as a staple, it
- A. is ploughed into the soil to increase fertility
- B. can be processes into corn flakes
- C. forms the base of most livestock feeds
- D. is used for producing germ oil
The factors essential for tourism are?
- A. accessibility, capital, amenties, accessibility and scenery
- B. goods weather, amenties, accessibility and scenery
- C. amenties, capital, accessibility and markets
- D. good weather, capital, schools and scenery