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JAMB UTME Chemistry 2016 past questions and answers

This 2016 JAMB UTME Chemistry set has 40 practice questions. Try these 5 free sample questions, tap a question to reveal the answer and explanation. Then practise the whole 2016 set with instant marking.

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Sample JAMB UTME Chemistry 2016 questions

1. Which process removes sulfur dioxide from flue gases by passing them through a limestone slurry?
  1. Catalytic cracking
  2. Flue-gas desulfurization
  3. Fractional distillation
  4. Electrolysis

Answer: B. Flue-gas desulfurization

Limestone slurry reacts with sulfur dioxide to form calcium sulfite or sulfate, reducing the gas released to the atmosphere.

2. A high concentration of nitrate ions in a lake is most likely to cause
  1. eutrophication
  2. ozone depletion
  3. acid rain
  4. photochemical smog

Answer: A. eutrophication

Nitrates enrich the water and stimulate excessive algal growth, leading to eutrophication.

3. Which pollutant is chiefly responsible for the depletion of stratospheric ozone?
  1. Carbon monoxide
  2. Sulfur dioxide
  3. Chlorofluorocarbons
  4. Methane

Answer: C. Chlorofluorocarbons

Chlorine radicals released from chlorofluorocarbons catalytically destroy ozone in the stratosphere.

4. A major cause of acid rain is the atmospheric oxidation of
  1. nitrogen and hydrogen
  2. carbon and helium
  3. methane and ethane
  4. sulfur dioxide and nitrogen oxides

Answer: D. sulfur dioxide and nitrogen oxides

Sulfur dioxide and nitrogen oxides form sulfuric and nitric acids after oxidation and dissolution in atmospheric water.

5. Which pair of reagents is suitable for extracting iron from haematite in a blast furnace?
  1. Coke and limestone
  2. Sodium and water
  3. Chlorine and sand
  4. Hydrogen and sodium hydroxide

Answer: A. Coke and limestone

Coke generates carbon monoxide to reduce the iron oxide, while limestone removes silica impurities as slag.

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