Jamb Chemistry Past Questions For Year 1988
Question 1
Which of the following dilute solutions has the lowest pH value?
- A. Calcium trioxocarbonate (IV)
- B. Sodium trioxocarbonate (IV)
- C. Hydrochloric acid
- D. Ethanoic acid
Question 2
A substance S is isomorphous with another substance R. When a tiny crystals of S is added into a supersaturated solution of R?
- A. S dissolves in the solution
- B. crystals of R are precipitated
- C. there is no observable change
- D. R and S react to generate heat
Question 3
The ion that may be assumed to have negligible concentration in a sample of water that lathers readily with soap is?
- A. Mg+
- B. K+
- C. CO22-
- D. HCO3
Question 4
Which of the following reactions takes place in the cathode compartment during the electrolysis of copper (II) chloride solution?
- A. Cu2+ + 2e- → Cu(s)
- B. 2Cl- -2e → Cl2
- C. Cu(s) -2e → Cu2+(aq)
- D. Cu2+(aq) + 2Cl-(aq) → CuCl2(aq)
Question 5
Which of the following acts both s a reducing and an oxidizing agent?
- A. H2
- B. SO2
- C. H2S
- D. C
