Waec Chemistry Past Questions
Question 1
The reaction represented by the equation NaOH(aq) + HCI(aq) → NaCI(aq) + H2O(/)
- A. is a double decomposition
- B. is a neutralization
- C. is reversible
- D. is usually catalysed
- E. attains equilibrium after a few seconds
Question 2
The following are uses of sulphur except
- A. manufacture of tetraoxosulphate (VI) acid
- B. prevention of the growth of fungi
- C. vulcanization rubber
- D. manufacture of dyes
- E. coating of steel to prevent rusting
Question 3
An acid present in proteins is
- A. lactic acid
- B. amino acid
- C. propanoic acid
- D. palmitic acid
- E. stearic acid
Question 4
Equilibrium is said to be attained in reversible reaction when
- A. all the reactants have been used up
- B. all the products have been formed
- C. there is no further change in temperature
- D. the rates of the forward and backward reactions are equal
- E. the rate of formation of the products decreases with time
Question 5
Copper metal will react with concentrated trioxonitrate (V) acid to give?
- A. Cu(NO3)3 + NO + N2O4 + H2O
- B. Cu(NO3)2 + NO + H2O
- C. CuO + NO2 + H2O
- D. Cu(NO2)3 + NO2 + H2O
