3.x Key Chemical Reactions (GCSE Chemistry)

The following is a GCSE Chemistry test covering '3.x Key Chemical Reactions'

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Question 1

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In chemical hand warmers, why is an exothermic reaction essential?

If no overall change is observed in a reaction, how would you describe it?

In a warming reaction used in hand warmers, what type of reaction is desired?

For an effective heat pack reaction, what is critical?

What happens to hydrated substances when heated strongly?

What do you call reactions which absorb heat?

Why do reactions occur faster at higher temperature?

How do hand warmers generate warmth?

What is the symbol `?` used for in reactions?

What is the effect on reaction rate if temperature increases?

What colour is anhydrous copper sulfate?

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