1
Q
Separate red dye from rose petals?
A
Dissolving.
2
Q
pH of common salt?
A
7.
3
Q
What is CO2?
A
Slightly acidic.
4
Q
What kind of reaction is between bromine and alkene?
A
Addition.
5
Q
What kind of bonds are between ionic structures?
A
Electrostatic forces.
6
Q
What is metallic bonding?
A
Positive ions and elections. Forces strong between positive ions and delocalised electrons.
7
Q
Test for Cl- ions?
A
Add nitric acid and silver nitrate and a white precipitate forms.
8
Q
What inert substance could be used for electrodes?
A
Platinum.
9
Q
Why is acid added before water is electrolysed?
A
Increase its conductivity.
Chemistry CGP Paper 2
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