Waec Chemistry Past Questions For Year 1996
Question 6
When an atom gains an electron, it becomes properties
- A. chemically inactive
- B. negatively charged
- C. oxidized
- D. a cation
- E. a complex ion
Question 7
An arrangement of two different metals in aqueous solutions of their salts to produce an electronic current is known as
- A. electrochemical cell
- B. activity series
- C. thermocouple
- D. voltameter
- E. galvanometer
Question 8
The following acids are monobasic except
- A. trioxonitrate (V) acid
- B. hydrochloric
- C. ethanoic acid
- D. tetraoxophosphorus (V) acid
- E. dioxonitrate (lll) acid
Question 9
Amphoteric oxides are oxides which
- A. react with water to form acids
- B. react with water to form alkali
- C. show neither acid nor basic properties
- D. react with acids alkalis
- E. contain high proportion of oxygen
Question 10
Which of the following equations represents a neutralization reaction?
- A. CaCI2 + 2HCI →CI2 +CaCI 2 + H2O
- B. Na2O2 + H2SO4 → Na2SO4 + H2O2
- C. H2SO4 + KOH → KHSO4 + H2 O
- D. 2Na + 2H2O → 2NaOH + H2
- E. CuSO4 + 2NaOH → Cu(OH)2+ Na2SO4
