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1076

Which of the following combinations of conditions may increase the rate of a chemical reaction?

  • A. Decrease in temperature, increase in concentration of the reactants
  • B. Increase in temperature, addition of a catalyst, decrease in the surface area of the reactants
  • C. Increase in temperature, increase in concentration, addition of a catalyst and increase in the surface area of the reactants
  • D. Decrease in temperature concentration and surface area of the reactants
  • E. Additionof a catalyst and in the absence of light
View Answer & Discuss (4) JAMB 1982
1077
Which of the following is NOT a redox reaction?
  • A. 2HNO2 + 2HI → 2H2O + 2NO + I2
  • B. Zn + H2SO4 → ZnSO4 + H2
  • C. Ca(HCO3)2 → CaCO3 + H2O + CO2
  • D. 4FeO + O2 → 2Fe2O3
  • E. 2Na + Cl2 → 2NaCl
View Answer & Discuss (8) JAMB 1982
1078
0.16g of methane when burnt raises the temperature of 100g of water by 40°C. What is the of combustion of methane when if the heat capacity of water is 4.2 Jg-1°C-1?

(CH4 = 16)
  • A. 1,160 kJ mol-1
  • B. 1,180 kJ mol-1
  • C. 1,560 kJ mol-1
  • D. 1,600kJ mol-1
  • E. 1,680 kJ mol-1
View Answer & Discuss (19) JAMB 1982
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1079
Which of the following processes NOT lead to a chemical change?
  • A. Strirring iron in sulphur (IV) acid
  • B. Stirring sodium carbonate in water
  • C. Stirring glucose in concentrated sulphur (IV) acid
  • D. Mixing sulphur (IV) acid with potassium carbonate
  • E. Titrating an acid against base
View Answer & Discuss (5) JAMB 1982
1080
Brass is an alloy containing copper and?
  • A. zinc
  • B. tin
  • C. aluminium
  • D. silver
  • E. lead
View Answer & Discuss (5) JAMB 1982
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