Waec Chemistry Past Questions For Year 2000
Question 1
Electrovalent compounds are characterized by
- A. solubility in ethanol
- B. high molar mass
- C. high melting point
- D. strong oxidizing ability
Question 2
An element Z has a combining power of 3. Which of the following formulae is correct of its compounds?
- A. ZSO3
- B. Z3CI2
- C. Z 2O 3
- D. ZS3
Question 3
Chlorine atom forms CI by
- A. losing one electron
- B. Sharing one electron
- C. Donating lone pair of electrons
- D. Gaining one electron
Question 4
The atoms of four elements are represented as 20Q, 16R, 10S and 8T Which of the elements would be unreactive?
- A. Q
- B. R
- C. S
- D. T
Question 5
A radioactive solid is best stored
- A. under paraffin oil
- B. under ultraviolet light
- C. in a cool, dark cupboard
- D. in a box lined with lead
