Waec Chemistry Past Questions For Year 1992
Question 1
Methanol is obtained from wood by
- A. esterification
- B. bacterial decomposition
- C. combustion
- D. fractional distillation
- E. destructive distillation
Question 2
The maximum number of electrons that can accommodated in the shell having the principal quantum number 3 is
- A. 3
- B. 9
- C. 10
- D. 18
- E. 32
Question 3
When steam is passed over white-hot coke, the products are
- A. carbon (IV) oxide and nitrogen
- B. carbon (II) oxide and hydrogen
- C. carbon (ll) oxide and nitrogen
- D. carbon (lV) oxide and steam
Question 4
The reactions ethyne are mainly
- A. substitution reactions
- B. addition reactions
- C. addition polymerization
- D. catalytic hydrogenation
- E. catalytic halogenation
Question 5
The following acids are monobasic except
- A. methanoic acid
- B. dioxonitrate lll acid
- C. ethanedioic acid
- D. oxochlorate (l) acid
- E. hydrobromic acid
