JAMB Chemistry 1981 Past Questions

Practice each question, then open it to see the full details.

Question 0
In the reaction of oxygen with hydrogen to produce water, which of the following statements is true?
  • A.One atom of hydrogen reacts with two atoms of oxygen to give one molecule of water
  • B.Two atoms of hydrogen react with two atoms of oxygen to give two molecules of water
  • C.One molecule of oxygen reacts with one molecule of hydrogen to give two molecules of water
  • D.One molecule of hydrogen reaccts with two molecules of oxygen to give three molecules of water
  • E.One molecule of oxygen reacts with two molecules of hydrogen to give two molecules of water
Objective
Question 0
The following compounds are given with their corresponding boiling points.
Compound Boiling Point
i.................................14°C
ii................................24°C
iii................................0°C
iv................................120°C
V.................................-2°C
From the above information, indicate which of the following is correct?
  • A.All the compounds are gaseous at 20 °C
  • B.One of the compounds is gaseous at 20 °C
  • C.Two of the compounds are gaseous at 20 °C
  • D.Three of the compounds are gaseous at 20 °C
  • E.None of the compounds is gaseous at 20 °C
Objective
Question 0
4g each of aluminium foil and aluminium powder were introduced respectively into flasks P and Q.
Flask P was treated with warm bench sodium hydroxide and all the aluminium dissolved in one hour. Flask Q was treated with cold sodium hydroxide and all the aluminium dissolved in 10 minutes. What was responsible for Q reacting faster than P?
  • A.There were more aluminium atoms in Q than P
  • B.The heat given off in retarded the reaction
  • C.Q generated more pressure than P during the reaction
  • D.P generated more pressure than Q
  • E.Q has a greater surface area for the reaction than P
Objective