Stoichiometry Jamb Chemistry Past Questions
Question 1
How much of magnesium is required to react with 260cm3 of 0.5 M HCl? [Mg = 24]
- A. 0.3g
- B. 1.5g
- C. 2.4g
- D. 3.0g
Question 2
1.00g of mixture of calcium carbonate and calcium oxide liberated 0.33g of carbon dioxide on strong heating. The percentage of calcium oxide in the mixture is? (Ca = 40, C = 12, O = 16)
- A. 5
- B. 15
- C. 25
- D. 35
- E. 50
Question 3
In the extraction of iron, which of the following reactions does NOT take place in the blast furnace?
- A. CO2 + C → 2CO
- B. 2Fe2O3 + 3C → 4Fe + 3CO2
- C. Fe2O3 + 3C → 2Fe + 3CO2
- D. CaCO3 → CaO + CO2
- E. CaO + SiO2 → CaSiO3
