Paper 2 PPQ

Question 1

Name the apparatus used to stir a mixture of salt and sand in water. (1)

Answer 1

– (stirring/glass/ plastic) rod

Question 2

A liquid that dissolves substances is called a … (1)

Answer 2

Solvent

Question 3

State the observation when aqueous sodium hydroxide is added to Iron (II) sulfate. (1)

Answer 3

Green precipitate

Question 4

State the observation when aqueous sodium hydroxide is added to Iron (III) sulfate. (1)

Answer 4

Brown precipitate

Question 5

State what is meant by the term ionic bonding. (2)

Answer 5

M1 electrostatic attraction/forces between ions

M2 of opposite charge

Question 6

Explain why the magnesium chloride has a high melting point. (3)

Answer 6

M1 attraction (between ions) is strong

M2 lots of ions (in structure) / giant structure / lattice / lots of/many bonds

M3 (therefore) lot of (thermal/heat)energy required to overcome attraction / to break down the lattice

Question 7

Which piece of apparatus should be used to measure 25.0cm^3 of KOH? (1)

Answer 7

Pipette (precise)

Question 8

At room temperature state the appearance of bromine. (1)

Answer 8

A red-brown liquid

Question 9

State the colour of CuCO3. (1)

Answer 9

Green

Question 10

State the colour of CuO. (1)

Answer 10

Black

Question 11

Suggest why Magnesium is not found as an element in the earth’s crust? (1)

Answer 11

It is too highly reactive.