Waec Chemistry Past Questions For Year 2014
Question 21
Which of the following relationships correctly expresses the Boyle's law?
- A. P \(\alpha\) V at constant T
- B. V \(\alpha\) T at constant P
- C. P \(\alpha\) \(\frac{1}{V}\) at constant T
- D. V \(\alpha\) \(\frac{1}{T}\) at constant P
Question 22
Which of the following statements about a chemical system in equilibrium is correct/ The
- A. reaction is irreversible
- B. reaction goes to completion
- C. equilibrium is re-established when a stress is applied
- D. equilibrium position is affected by catalyst
Question 23
Consider the reaction represented by the following equation: Na2CO3(aq) + 2HCl(aq) \(\longrightarrow\) 2NaCl(aq) + H2O(l) + CO2(g) . What volume of 0.02 mol dm-3 Na2CO3(aq) would be required to completely neutralize 40 cm3 of 0.10 mol dm-3 HCl(aq)?
- A. 200 cm3
- B. 100 cm3
- C. 40 cm3
- D. 20 cm3
Question 24
Which of the following salts on hydrolysis would give an alkaline solution?
- A. NH4CI(s)
- B. AICI3(s)
- C. CH3COONa(s)
- D. NH4NO3(s)
Question 25
The gases produced when Cu(NO3)2(s) was heated are
- A. NO and NO2
- B. O2 and NO
- C. NO2 and N2O4
- D. O2 and NO2
