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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Why do reactions occur faster at higher temperature?

What type of reaction transfers heat to the surroundings?

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

When copper sulfate is hydrated, what colour does it become?

What is a common indicator of an exothermic reaction?

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

What is the effect on reaction rate if temperature increases?

How do hand warmers generate warmth?

For an effective heat pack reaction, what is critical?

What happens when water is added to anhydrous copper sulfate?

If an exothermic reaction takes place, what happens to the temperature of surroundings?

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