Past Papers Got Wrong Questions

Question 1

How is electrolyte made from aluminium oxide

Answer 1

Dissolve in Molten cryolite

Question 2

What converts but-2-ene to butane

Answer 2

Hydrogen

Question 3

First step in phyto mining

Answer 3

Grow plants on land containing copper compounds to absorb them

Question 4

Polymer

Answer 4

Long chain molecule made of repeating units /by joining small molecules together

Question 5

Is given a volume of a product and asked to find the mass of a reactant

Answer 5

Calculate moles of the product by volume divided by 24000
Ratio
Use gram equals moles times Mr

Question 6

Avogadro’s law

Answer 6

Equal volumes of gas contain the same number of particles under the same conditions of temperature and pressure

Question 7

Finding the total volume of gas produced if given mass of reactant

Answer 7

Make sure it’s in grams
Find mole of reactant
Ratio
Use volume equals more times 24

Question 8

Advantages of phyto mining over traditional methods

Answer 8

Uses scrap iron
Plants provide energy when burned
less destructive
Last noise/dust pollution

Question 9

What is the gain of oxygen

Answer 9

Oxidation

Question 10

Why is aluminium extracted by electrolysis

Answer 10

Aluminium oxide is more reactive than iron so cannot be used in the blast furnace

Question 11

Why not use unreactive metal to prepare hydrogen

Answer 11

Reaction would be too slow