OCR GCSE Chemistry A: Gateway Science (J248) · OCR J248
C3 Chemical reactions
Written & reviewed by James Millett — Biology (Imperial College London), PGCE Science (University of Cambridge).
Practice questions on Chemical reactions
- A student carries out electrolysis of brine (concentrated sodium chloride solution) using … (4 marks, Describe)
- Aluminium is extracted from its ore by electrolysis of molten aluminium oxide. Explain wha… (4 marks, Explain)
- A student adds magnesium ribbon to a solution of copper sulfate. The magnesium ribbon grad… (4 marks, Explain)
- A student uses a cold pack to reduce swelling after a sports injury. When the cold pack is… (4 marks, Explain)
- Hand warmers contain iron powder. When a hand warmer is activated, iron reacts with oxygen… (4 marks, Explain)
- A student adds a small amount of anhydrous calcium chloride to a test tube of water. The s… (4 marks, Explain)
- A student burns a piece of wood in a fireplace. The room feels warmer after the wood has b… (4 marks, Explain)
- A student places a piece of magnesium ribbon into a beaker of dilute hydrochloric acid. Th… (4 marks, Explain)
- Hand warmers are small packets used by skiers and hikers to keep their hands warm. Inside … (4 marks, Explain)
- A student dissolves ammonium nitrate crystals in water in a beaker. The outside of the bea… (4 marks, Explain)
- A student adds a small amount of citric acid powder to a glass of water and stirs it. The … (4 marks, Explain)
- Hand warmers contain chemicals that react when the pack is activated. Explain why a hand w… (4 marks, Explain)
- A student places a cold pack on a sports injury. The cold pack contains ammonium nitrate a… (4 marks, Explain)
- A student dissolves citric acid powder in water to make a lemon-flavoured drink. The stude… (4 marks, Explain)
- A student uses a sparkler on Bonfire Night. The sparkler glows brightly and gives out a la… (4 marks, Explain)
- Camping stoves burn propane gas to heat food. When propane burns in oxygen, carbon dioxide… (4 marks, Explain)
- A student dissolves a fizzing indigestion tablet in a beaker of water. The student notices… (4 marks, Explain)
- During the electrolysis of copper sulfate solution, copper is deposited at one electrode a… (4 marks, Explain)
- A scientist carries out electrolysis of molten lead bromide using inert electrodes. Explai… (4 marks, Explain)
- A student carries out electrolysis of copper chloride solution using inert electrodes. Exp… (4 marks, Explain)
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