8.

Which of the following processes would be involved in order to separate Fe2+(aq) ions from a mixture containing Fe2+(aq) and Na+(aq) ions?

A Conducting a flame test

B Distilling the mixture

C Using a separating funnel

D Adding NH3(aq) to the mixture

9.

Which of the following statements concerning ammonium iodide is correct?

A It is a weak alkali.

B It is a covalent compound.

C Its solution gives a precipitate when mixed with silver nitrate solution.

D No reaction will occur when it is heated with calcium hydroxide.

10.

Which of the following methods can be used to separate zinc from a mixture of zinc and zinc chloride?

A Add water, filter and dry the residue.

B Add dilute hydrochloric acid, evaporate, filter and dry the residue.

C Add dilute nitric acid, crystallize, filter and dry the residue.

D Add aqueous ammonia, crystallize, filter and dry the residue.

11.

The table below shows the results of two tests on the solution of substance X.

Test

Description

Observation

I

Adding dilute sodium hydroxide solution

A green precipitate

II

Mixing with barium nitrate solution

A white precipitate

X could be

A copper(II) chloride.

B copper(II) sulphate.

C nickel(II) chloride.

D nickel(II) sulphate.

12.

The table below shows the results of two tests on the solution of substance X.

Test

Description

Observation

I

Adding sodium chloride solution

A white precipitate

II

Adding dilute sodium hydroxide solution

A white precipitate which dissolves in excess alkali

X could be

A copper(II) sulphate.

B lead(II) nitrate.

C magnesium sulphate.

D zinc chloride.