Post Utme Chemistry Questions
Question 626:
Which reaction usually produces a precipitate?
- A Magnesium with hydrochloric acid
- B Methane with oxygen
- C Silver nitrate with sodium chloride
- D Sodium with water
Question 627:
During balancing of equations, the formulas of compounds should:
- A Be removed completely
- B Be altered freely
- C Remain unchanged
- D Be divided equally
Question 628:
The reaction 2Fe + 3Clâ‚‚ → 2FeCl₃ forms:
- A Iron carbonate
- B Iron(II) oxide
- C Ferric sulphate
- D Iron(III) chloride
Question 629:
The equation Feâ‚‚O₃ + 3CO → 2Fe + 3COâ‚‚ shows iron oxide:
- A Decomposing into ions
- B Gaining hydrogen
- C Losing oxygen
- D Forming acid
Question 630:
The equation 2Cu + Oâ‚‚ → 2CuO shows copper:
- A Decomposing completely
- B Losing oxygen atoms
- C Gaining oxygen atoms
- D Becoming colourless