AQA C3 Quiz

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Created by: Maleficent
Created on: 13-05-11 16:38

What makes water hard?

Calcium and magnesium

1 of 5

Why is chlorine gas used during water treatment?

To kill harmful bacteria

2 of 5

A reaction is endothermic when ...

Energy to break bonds > Energy to make bonds

3 of 5

What colour precipitate is formed when Fe3+ is added to sodium hydroxide?

Brown

4 of 5

Why are catalysts used?

To reduce the activation energy needed

5 of 5

Other cards in this set

Card 2

Front

Why is chlorine gas used during water treatment?

Back

To kill harmful bacteria

Card 3

Front

A reaction is endothermic when ...

Back

Card 4

Front

What colour precipitate is formed when Fe3+ is added to sodium hydroxide?

Back

Card 5

Front

Why are catalysts used?

Back

Comments

Aqua

Report Fri 13th May, 2011 @ 17:17

Nice one Maleficent. Thank you.

Maleficent

Report Fri 13th May, 2011 @ 17:36

Thanks, Bryony.

nush

Report Sun 15th May, 2011 @ 20:07

very good 4/5 :)

Lizzie

Report Mon 23rd May, 2011 @ 13:16

Great quiz! Thank you :)

rubani

Report Tue 24th May, 2011 @ 15:57

really helpful

esp. before exam 2moro :)

Other cards in this set

Card 2

Front

Back

Card 3

Front

Back

Card 4

Front

Back

Card 5

Front

Back

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