Acids, Bases, and Salts Quiz

What is an acid?

• A substance that has a pH of more than 7 and can neutralise a base.

• A substance that has a pH of less than 7 and can neutralise a base.

• A substance that has a pH of exactly 7 and can neutralise a base.

• A substance that has a pH of less than 7 and cannot neutralise a base.

What is a base?

• A substance that can neutralise an acid.

• A substance that can neutralise a base.

• A substance that has a pH of less than 7.

• A substance that releases H⁺ ions in solution.

What is an alkali?

• A water-soluble base that has a pH greater than 7.

• A water-soluble base that has a pH less than 7.

• A water-insoluble base that has a pH greater than 7.

• A water-insoluble base that has a pH less than 7.

What does the pH scale tell us?

• How acidic or alkaline a substance is.

• The temperature of a substance.

• The density of a substance.

• The color of a substance.

What is universal indicator?

• A mixture of dyes that changes color at different pH values.

• A single dye that changes color at different pH values.

• A mixture of dyes that changes color at a single pH value.

• A single dye that changes color at a single pH value.

Give the colors of universal indicator in different pH solutions.

• Red for acidic, green for neutral, purple for alkaline.

• Blue for acidic, yellow for neutral, red for alkaline.

• Yellow for acidic, blue for neutral, green for alkaline.

• Green for acidic, red for neutral, blue for alkaline.

What is neutralisation?

• A reaction between an acid and a base that results in a pH of 7.

• A reaction between an acid and a base that results in a pH of 14.

• A reaction between an acid and a base that results in a pH of 0.

• A reaction between an acid and a base that results in a pH of 1.

What is a salt?

• An ionic compound formed from positive metal ions and negative non-metal ions.

• An ionic compound formed from negative metal ions and positive non-metal ions.

• A covalent compound formed from positive metal ions and negative non-metal ions.

• A covalent compound formed from negative metal ions and positive non-metal ions.

What is the formula for hydrochloric acid?

• HCl

• H₂SO₄

• HNO₃

• CH₃COOH

Which salts are produced from hydrochloric acid?

• Chloride salts

• Sulfate salts

• Nitrate salts

• Ethanoate salts