Science — AI-generated practice question

Dissolving a concentrated acid or base in water must be done carefully because it is a highly exothermic process — it releases a large amount of heat. The acid/base must always be added slowly to water (never water to acid), as the sudden heat released can cause the mixture to splash or boil, causing serious burns.

It is an exothermic process.

Source: Chapter 2, What you have learnt

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• The examiner expects two things: why (large heat is released / exothermic) and what type (exothermic process). Both are needed for full 2 marks.
• A common mistake is saying "water is added to acid" — it is always acid added to water (though the textbook simply calls it exothermic; the safety rule reinforces the answer).
• Keep it concise; don't over-explain.