Waec Chemistry Past Questions For Year 2007
Question 26
Which of the following substances is suitable solvent for perfumes?
- A. Benzene
- B. Ethanol
- C. Turpentine
- D. Water
Question 27
What product is formed at the cathode during the electrolysis of concentrated sodium chloride solution using carbon electrodes?
- A. Chlorine
- B. Hydrogen
- C. Oxygen
- D. Sodium
Question 28
What is the oxidation number of chromium in K2CrO4?
- A. +1
- B. +2
- C. +4
- D. +6
Question 29
Glucose reduces Fehling's solution on warming to
- A. copper (l) oxide
- B. copper (ll) oxide
- C. copper (l) chloride
- D. copper (ll) hydroxide
Question 30
Which of the following compounds reacts readily with sodium to liberate hydrogen?
- A. CH3CH2CH3
- B. CH3COOH
- C. CH3 CH2CHO
- D. CH3 CH(OH)CH3
