An acid can be defined as

• A compound which produces OH- ions

• A compound which produces oxygen ions in solution

• A compound which produces H+ ions in solution as the only positive ions

• A compound which produces positive ions in soluion

A hydrogen ion is also called a proton because

• There are equal number of electrons and protons

• It contains neutrons and electrons only

• It contains protons only

• It contains electrons only

The basicity of an acid is determined by

• the amount of negative ions it has

• the amount of hydrogen ions present

• the amount of hydroxide ions present

• the amount of oxygen ions present

The acids HCl and HNO₃ both have a basicity of

• four

• three

• two

• one

The acid with a basicity of three is

• H₂SO₄

• H₃PO₄

• H₂CO₃

• HCl

The acid found in the stomach is called

• sulphuric acid

• hydrochloric acid

• citric acid

• acetic acid

The acid used in car batteries is called

• sulphuric acid

• hydrochloric acid

• muracic acid

• Phosphoric acid

An example of an acid salt is

• H₂SO₄

• NaHSO₄

• Na₂SO₄

• MgSO₄

A substance was found to have a pH of 5. This indicates that the substance was

• Very acidic

• weakly acidic

• strongly alkaline

• weakly alkaline

When acids react ______________ is always produced

• carbon dioxide

• water

• hydrogen

• a salt