JAMB Chemistry Past Questions (2006)
Q1. The solution that will conduct the highest amount of electricity is
A. 2.0 moldm-3 of ethanoic acid
B. 0.5 mol dm-3 of ethanoic acid
C. 2.0 mol dm-3 of hydrochloric acid
D. 0.5 moldm-3 of hydrochloric acid
Answer: C
Q2. The idea of planetary electrons was that of
A. Bohr
B. Thompson
C. Rutherford
D. Dalton
Answer: A
Q3. The ion that will give a white precipitate with aqueous NaOH and soluble in excess of the base is
A. Zn2+
B. Mg2+
C. Ca2+
D. Cu2+
Answer: A
Q4. The volume of 2.5 moles of oxygen at s.t.p is
A. 56.0dm3
B. 84.0dm3
C. 50.0dm3
D. 20.0dm3
Answer: A
Q5. The order in which a mixture of sand ammonium chloride and sodium chloride can be separated is
A. Sublimation dissolution filtration evaporation
B. Dissolution dryness filtration evaporation
C. Filtration sublimation evaporation dryness
D. Dissolution filtration sublimation evaporation
Answer: A
Q6. The characteristic colour of the flame shown when a copper salt moistened with concentrated hydrochloric acid on platinum is put on a bunzen burner is
A. Green
B. Lilac
C. Yellow
D. Brick-red
Answer: A
Q7. CH3-CH2-C = CH The hybridization in the compound above is
A. Sp3 and sp
B. Sp3 and sp2
C. Sp
D. Sp2
Answer: A
Q8. Which of he following pairs of substances will react further with oxygen to form a higher oxide
A. SO2 and NO
B. CO2 and H2O
C. CO and CO2
D. NO and H2O
Answer: A
Q9. [Molar volume of a gas at s.t.p + 22.4dm3} Nuclear fission involves the splitting of a heavy element into two nuclei of
A. Equal masses with a release of energy
B. Nearly equal masses with a release of energy and radiation
C. Equal masses with a release of energy and radiation
D. Unequal masses without any release of energy
Answer: B
Q10. Which of the following has an isomer
A. C4H10
B. C6H6
C. C2H4
D. C2H6
Answer: A
Q11. In the industrial production of H2 from natural gas, the CO2 produced along with the H2 is removed by
A. Passing the mixture into lime water
B. Washing under pressure
C. Drying over phosphorous(V)oxide
D. Using ammoniac copper(l) chloride
Answer: B
Q12. A particle that contain s 11protons, 12 neutrons and 10 electrons is probably a
A. Metallic ion
B. Non-metallic ion
C. Neutral metal
D. Neutral non-metal
Answer: A
Q13. The ion that can be used as an oxidizing agent is
A. Fe3+
B. F-
C. Ca2+
D. Au3+
Answer: C
Q14. 5SO2(g) + 2KMnO4(aq) + 2H2O(l) ⇌ K2SO4(aq) + 2MnSO4(aq) + 2H2HSO4(aq) In the reaction above, the products give a
A. Colourless solution
B. Purple precipitate
C. Purple solution
D. Colourless precipitate
Answer: A
Q15. Which of the following typically represents a photochemical reaction
A. Conversion of dinitrogen (IV) oxide to nitrogen(IV) oxide
B. Conversion of silver halides to grey metallic silver
C. Decomposition of calcium hydroxide to its oxide
D. Formation of water from hydrogen and oxygen molecules
Answer: B