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Chemistry Past Questions

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1026
When a solution of silver (l) nitrate is saturated with hydrogen sulphide, a black precipitate forms which is?
  • A. H2S
  • B. Ag2S
  • C. PbS
  • D. HNO3
  • E. S
View Answer & Discuss (3) JAMB 1982
1027
The production of ammonia by the haber process may be represented by the equilibrium equation N2(g) + 3H2(g) ↔ 2NH3 ∆H = -22KJ. Therefore the production of ammonia will be favoured by?
  • A. only high pressure
  • B. only high temperature
  • C. a combination of high temperature and low pressure
  • D. a combination of low temperature and high pressure
  • E. low pressure
View Answer & Discuss (5) JAMB 1982
1028
Which of the following represents ethyl ethanonate?
  • A. CH3CH2CO2CH3
  • B. (CH3CO2)2O
  • C. CH3CH2CO2CH2CH3
  • D. CH3CO2CH2CH3
  • E. CH3CH2COCH2CH3
View Answer & Discuss (9) JAMB 1982
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1029

Which of the following equations represents an oxidizing action of sulphur dioxide?

  • A. SO2 + 2HNO2 → H2SO4 + 2NO2 + heat
  • B. 2SO2 + 2H2O + O2 → 2H2SO4
  • C. SO2 + 2H2O + CI2 → H2SO4 + 2HCI
  • D. SO2 + 2H2S → 3S + 2H2O
  • E. K2Cr2O7 + H2SO4 + 3SO2 → K2SO4 + Cr2(SO4)3 + H2O
View Answer & Discuss (8) JAMB 1982
1030
If the rate of diffusion of oxygen gas is taken as 1, what will be rated of diffusion of methane whose relative molar mass is 16?
  • A. 2.0
  • B. 1.8
  • C. 1.4
  • D. 1.0
  • E. 0.5
View Answer & Discuss (17) JAMB 1982
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