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NECO SSCE Chemistry 2026 past questions and answers

This 2026 NECO SSCE 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 2026 set with instant marking.

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Sample NECO SSCE Chemistry 2026 questions

1. In the blast furnace, which substance is chiefly responsible for reducing iron(III) oxide to iron?
  1. Carbon monoxide
  2. Calcium carbonate
  3. Silicon dioxide
  4. Nitrogen

Answer: A. Carbon monoxide

Carbon monoxide removes oxygen from iron(III) oxide to form iron and carbon dioxide.

2. In the fractional distillation of crude oil, which fraction generally has the highest boiling range?
  1. Refinery gas
  2. Bitumen
  3. Petrol
  4. Kerosene

Answer: B. Bitumen

Bitumen contains the largest molecules among these fractions and therefore has the highest boiling range.

3. What is the main organic product when ethene reacts with bromine?
  1. Bromoethane
  2. Ethanol
  3. 1,2-dibromoethane
  4. Ethanoic acid

Answer: C. 1,2-dibromoethane

Bromine adds across the carbon-carbon double bond in ethene to form 1,2-dibromoethane.

4. What is the molecular formula of the alkane with four carbon atoms?
  1. C4H8
  2. C4H6
  3. C4H12
  4. C4H10

Answer: D. C4H10

Alkanes have the general formula CnH2n+2, so for n = 4 the formula is C4H10.

5. Which functional group is present in ethanoic acid?
  1. -COOH
  2. -OH
  3. -CHO
  4. -COO-

Answer: A. -COOH

Ethanoic acid is a carboxylic acid and contains the -COOH group.

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