Waec Chemistry Past Questions For Year 2002
Question 1
The atomic number of chlorine is 17. What is the number of electrons in a chloride ion?
- A. 16
- B. 17
- C. 18
- D. 19
Question 2
If the relative molecular mass of an element is not a whole number, it can be deduced that the element is
- A. naturally radioactive
- B. abundant in nature
- C. a transition metal
- D. an isotopic mixture
Question 3
Which of the following processes takes place during the production of margarine from vegetable oils?
- A. Esterification
- B. Hydrolysis
- C. Hydrogenation
- D. Saponification
Question 4
When concentrated sodium chloride solution is electrolysed using inert electrodes the products are?
- A. oxygen and hydrogen
- B. hydrogen and oxygen
- C. sodium and oxygen
- D. soduim hydroxide, hydrogen and chlorine
Question 5
If two metallic ions of the same concentration migrate to a graphite cathode, the one that would be preferentially discharged is the one that has the
- A. smaller mass
- B. lower electrical charge
- C. greater stability in solution
- D. stronger tendency to accept electrons
