Acids and ALKALIS

Which of the following substances contain acid?

• An orange

• Bleach

• Distilled water

• Washing powder

Which of the following substances contain an alkali?

• Baking powder

• Coca cola

• Distilled water

• Vinegar

Which of the following pH numbers indicates a neutral substance?

• 1

• 5

• 13

• 7

Which of the following pH numbers indicates a strong acid?

• 1

• 5

• 10

• 9

Which of the following pH numbers indicate a strong alkali?

• 1

• 7

• 9

• 14

_{What is the hazard shown in this hazard sign}

• Explosive

• Corrosive

• Irritant

• High level Irritant

The pH scale is a range from:

• 1-7

• 0-14

• 1-20

• 1 - 6

What is the pH of pure water?

• 7

• 14

• 4

• 6

A wasp sting is alkaline. Which one of these substances would neutralise the sting?

• Vinegar

• Baking soda

• Bleach

• Pure water

An acid turns red litmus paper blue.

• True

• False