GCSE Chemistry – Separate Chemistry – 1 – Exam Style Questions with Answers

Give one reason why metals are electroplated.

This question is about the metal gold.
Gold can be hammered into shape.
State the name of this property………….

Iron objects can corrode when exposed to the atmosphere.
Corrosion involves the oxidation of iron.
State what is meant by oxidation……………

Gold is often alloyed with other metals when it is used to make jewellery.
The proportion of gold in a piece of gold jewellery is measured in carats.
Pure gold is 24 carats.
A 9 carat gold ring has a mass of 12 g.
Calculate the mass of gold in this ring.

mass of gold ring = ..................................... g

Alloys are mixtures of two or more metals.
Brass is an alloy of copper.
Figure 3 shows the brass pins of an electric plug
Brass is harder than copper.
Give a reason why using a harder substance for the pins is an advantage.

Magnesium is more reactive than iron.
Figure 10 shows an iron nail with a strip of magnesium wrapped around it, placed in
some water.
The tube was left for a few days.
State what would happen to this iron nail………….

Many metals corrode.
When a metal corrodes ……………………….

Transition metals have many uses.
The pie chart in Figure 6 shows the uses of one transition metal.
Calculate the percentage of this transition metal used in construction.

percentage of this transition metal used in construction = ……………………………….

When iron rusts, a brown solid forms on the surface of the iron.
What happens to the iron as the rust forms?

The apparatus shown in Figure 13 was used to electroplate a spoon with nickel.
Predict the name of a substance that could be dissolved in water to form the electrolyte
for this electroplating………………..