Salts

Which substance reacts with zinc to form a salt?

• oxygen

• water

• hydrochloric acid

• nitrogen

The apparatus shown can be used to prepare aqueous copper(II) sulphate.

• A

• B

• C

• D

Barium hydroxide is an alkali. It reacts with hydrochloric acid.

What happens to the pH of a solution of hydrochloric acid as an excess of aqueous barium hydroxide is added?

• The pH increases from 1 to about 14.

• The pH decreases from 14 but becomes constant at 7.

• The pH decreases from 14 to about 1.

• The pH increases from 1 but becomes constant at 7.

Aqueous lead(II) nitrate is added to a solution containing iodide ions. Lead(II) iodide is formed.

Which type of reaction takes place?

• precipitation

• reduction

• neutralisation

• oxidation

A solution of zinc sulfate can be made by adding an excess either of zinc carbonate or of zinc hydroxide to dilute sulfuric acid.

In which forms are these zinc compounds added to the acid?

• A

• B

• C

• D

Some reactions of a substance, R, are shown in the diagram.

What type of substance is R? acid

• a salt

• a base

• an element

• an acid

Which element reacts with dilute sulfuric acid to produce hydrogen?

• carbon

• zinc

• copper

• chlorine

Which two processes are involved in the preparation of magnesium sulphate crystals from dilute sulphuric acid and an excess of magnesium oxide?

• neutralisation and oxidation

• neutralisation and filtration

• decomposition and oxidation

• decomposition and filtration

An excess of acid in the stomach causes indigestion that can be cured by an anti-indigestion tablet.

What should the tablet contain to decrease the acidity?

• an acidic substance

• an alkaline substance

• a neutral substance

• Universal Indicator

Which properties does an acid have?

1 reacts with Zinc to form a salt and hydrogen gas

2 turns blue litmus red

• A

• B

• C

• D