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Chemistry JAMB Past Questions

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656

On heating, under suitable conditions, 1 litres of monoatomic gas,X, combines with 1½ litres of an oxide, What is the formula of the oxide?

  • A. XO3
  • B. X2O3
  • C. X3O2
  • D. XO2
  • E. None of the above
View Answer & Discuss (27) JAMB 1980
657

If 1 litre of 2.2M sulphuric acid is poured into a bucket containing 10 litre of water,and resulting solution mixed thoroughly, the resulting sulpuric acid concentration will be?

  • A. 2.2 M
  • B. 1.1 M
  • C. O.22 M
  • D. 0. 11 M
  • E. 0.20 M
View Answer & Discuss (24) JAMB 1980
658
Which of the following reactions is correct as as written?
  • A. FeCl2 + 3NH4OH → Fe(OH)3 + 3NH4Cl
  • B. Pb2O3 + 4HCl → PbCl2 + 2H2O
  • C. PbNO3 + H2S → PbS + 2HNO3
  • D. NaOH + H2SO4 → NaHSO4 +H2O
  • E. 2NH4NO3 → N2 + 2H2O
View Answer & Discuss (13) JAMB 1980
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659

Under high pressure, real gases do not obey gas laws because their molecules?

  • A. have become more energetic
  • B. have become less energetic
  • C. have become smaller in size
  • D. decompose into atoms
  • E. start repelling each other
View Answer & Discuss (25) JAMB 1980
660
How many grams of hydrogen gas will be liberated when 6g of magnesium ribbon dissolves in 500cm3 of 6M HCl?


(Mg=24, H=1, Cl=35.5)
  • A. 1.2 g
  • B. 0.7 g
  • C. 0.5 g
  • D. 0.3 g
  • E. 0.12 g
View Answer & Discuss (21) JAMB 1980
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