GCSE Combined Science Chemistry

Question 1

What is the relative charge of a proton?

Accepted Answer

+1

Answer

-1

Answer

0

Answer

+2

Question 2

Which of the following substances has a giant covalent structure?

Accepted Answer

Diamond

Answer

Sodium chloride

Answer

Methane

Answer

Magnesium oxide

Question 3

What is produced when a metal reacts with an acid?

Accepted Answer

Salt + hydrogen

Answer

Metal oxide + water

Answer

Salt + water

Answer

Metal hydroxide + water

Question 4

In the periodic table, what name is given to the elements in Group 7?

Accepted Answer

Halogens

Answer

Alkali metals

Answer

Noble gases

Answer

Transition metals

Question 5

What happens to the mass of a substance when it is burned in an open container?

Accepted Answer

The mass may appear to decrease because gaseous products escape

Answer

The mass always decreases

Answer

The mass always stays the same

Answer

The mass doubles

Question 6

What type of bonding is found in a molecule of water (H₂O)?

Accepted Answer

Covalent bonding

Answer

Ionic bonding

Answer

Metallic bonding

Answer

Hydrogen bonding