ACIDS, BASES AND INDICATORS.

Which of the following indicators cannot be stored in the laboratory for a longer period of time?

• Flower extract

• Methyl orange

• Phenolphthalein

• Litmus

Which of the following is not an acid?

• Ammonia solution

• Ethanoic

• Methanoic

• Citrus

Which of the following pH is strongly acidic?

• 5.0

• 14

• 9.5

• 1.0

Which of the following has a pH of 14?

• Ammonia solution

• Distilled water

• Ethanoic acid

• Sodium hydroxide solution

Give the products formed when Zinc reacts with Hydrochloric acid.

• Zinc and Hydrogen

• Zinc chloride and oxygen

• Zinc chloride and Hydrogen

• Zinc and salt

Give the products formed when zinc reacts with Sulphuric (VI) acid.

• Salt + Water

• Zinc sulphate + Hydrogen

• Zinc + Hydrogen

• Zinc sulphate + Copper

What are the products formed when aluminium reacts and Hydrochloric acid?

• Aluminium + water

• Aluminium + Oxygen

• Aluminium + Sulphate

• Aluminium chloride + Hydrogen gas

What are the products formed when metal reacts with hydrochloric acid?

• Salt + Hydrogen

• Salt + water

• Salt + Oxygen

• Salt + Carbon (IV) oxide

What is the pH of Sodium chloride?

• 7.5

• 6

• 7

• 13

What is the pH of Distilled water found in the Dining Hall?

• 5

• 14

• 1

• None of the above