Revision notes topic questions past papers

> NOW TRY SOME EXAM QUESTIONS

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2 ORGANISATION OF THE ORGANISM

YOUR NOTES

7 CHEMICAL REACTIONS

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CIE IGCSE Chemistry Revision Notes

CIE IGCSE Chemistry Resources

REVISION NOTES      TOPIC QUESTIONS      PAST PAPERS

QUESTION 1

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QUESTION 2

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Water and a white solid are produced when blue copper(II) sulfate is heated. 

On the addition of water to the white solid, heat is released and the white solid 

turns blue.

Which row correctly describes the reaction and the blue copper(II) sulfate?

type of reaction

blue copper(II) sulfate

A

non-reversible

anhydrous

B

reversible

anhydrous

C

non-reversible

hydrated

D

reversible

hydrated

Steam and a blue solid are produced when pink cobalt(II) chloride crystals are 

heated. With the addition of water to the blue solid, heat is released and the 

blue solid turns pink.

Which row correctly describes the reaction and the pink cobalt(II) chloride 

crystals?

type of reaction

pink cobalt(II) chloride