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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What type of reaction transfers heat to the surroundings?

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

What colour is anhydrous copper sulfate?

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

When copper sulfate turns blue from white, it is due to what?

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

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

What is a common indicator of an exothermic reaction?

How do hand warmers generate warmth?

What energy change occurs in an exothermic reaction?

What is the effect on reaction rate if temperature increases?

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