Y10 Mid-GCSE review

A single line drawn between two atoms represents:

• A single covalent bond

• A single electron

• A shared pair of electrons

• A single proton

An anion is:

• An onion which has gone bad.

• A positive ion.

• A negative ion.

• A molecule.

A compound with an -ate ending:

• Contains oxygen only.

• Contains sulphur.

• Contains oxygen in addition to two other elements.

• Contains nitrogen.

What is the sulphate ion?

• S^2-

• S²⁺

• SO₄^2-

• SO₄²⁺

Name the compound MgCO₃

• Magnesium carbonite

• Magnesium carbonate

• Magnesium carbon

• Magnesium carbonide

Give the formula of sodium sulphate.

• NaSO₄

• NaSO

• Na₂SO

• Na₂SO₄

What is the formula of aluminium carbonate?

• Al(CO₃)₃

• Al₂(CO₃)₃

• Al₃(CO₂)₂

• Al₂CO₃

What is the formula of ammonium hydroxide?

• (NH₄)₂OH

• NH₄OH

• NH₆O

• NH₃O

Select the correct equation for the following reaction:

iron reacting with sulphur to form iron (II) sulphide.

• $Fe\ +S\ +2O_2\ \rightarrow\ FeSO_4$

• $Fe\ +S\ +O_2\ \rightarrow\ FeSO_4$

• $Fe\ +S\ \rightarrow\ FeS$

• $Fe\ +2S\ \rightarrow\ FeS_2$

High pH values show solutions are:

• Strongly acidic

• Strongly alkaline

• Neutral

• Weakly acidic