Waec Chemistry Past Questions For Year 2007
Question 36
The following substances are heavy chemicals except
- A. sodium trioxocarbonate (IV)
- B. tetraoxosulphate (VI) acid
- C. lead (lV) tetraethyl
- D. sodium hydroxide
Question 37
Which of the following methods can be used to separate a mixture of two miscible liquids with different boiling points?
- A. Decantation
- B. Distillation
- C. Evaporation
- D. Filtration
Question 38
from the following ores is iron extracted? I. Haematite ll. Bauxite III. Magnetite IV. Cassiterite
- A. l and ll only
- B. l and lll only
- C. l, ll and lll only
- D. l, ll, lll and lV
Question 39
Which of the these metals will not liberate hydrogen from dilute HCI?
- A. Copper
- B. Iron
- C. Magnesium
- D. Zinc
