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5.2 Controlling reactions

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Question 19
F

A student has four blocks of the same reactive solid. Each block has a volume of 8 cm38\,\mathrm{cm^{3}}8cm3, but the blocks have different shapes.

Each block is added to the same volume of the same acid.

Which block reacts fastest at the start?

[1]
A

A block measuring 1 cm × 1 cm × 8 cm

B

A block measuring 4 cm × 4 cm × 0.5 cm

C

A block measuring 2 cm × 2 cm × 2 cm

D

A block measuring 1 cm × 2 cm × 4 cm

Markscheme

5.2 Controlling reactions Questions

  1. GCSE
  2. /Chemistry
  3. /5.2 Controlling reactions

56 exam-style questions on OCR GCSE Chemistry 5.2 Controlling reactions, covering 5.2.1 Measuring and interpreting rate of reaction, 5.2.2 Factors affecting rate and collision theory, and 5.2.3 Catalysts, activation energy and enzymes. Each one has a worked solution and a mark scheme showing where the marks go.

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