Scientific Eye - Acids and Alkalis

What is the origin of the word 'acid'?

• From the Greek word meaning 'bitter'

• From the Latin word meaning 'sharp'

• From the Arabic word meaning 'sour'

• From the English word meaning 'strong'

What is an example of a common acid?

• Lemon juice

• Bicarbonate of soda

• Calcium carbonate

• Sodium hydroxide

What can strong acids and alkalis do to metals?

• None of the above

• Strengthen them

• Dissolve them

• Polish them

What is the pH of a strong acid?

• More than 11

• Less than 3

• Around 14

• Around 7

What is used to indicate the difference between acids and alkalis?

• Universal indicator

• Red cabbage extract

• Distilled water

• Both A and B

What is the pH of human blood?

• 1

• 7

• 14

• 3

What is the chemical name for limestone?

• Calcium carbonate

• Sodium hydroxide

• Calcium sulfate

• Sulfuric acid

What does sulfur dioxide react with to form acid rain?

• Oxygen

• Water vapor

• Carbon dioxide

• Limestone

What is gypsum also known as?

• Sodium hydroxide

• Sulfuric acid

• Calcium sulfate

• Calcium carbonate

What is the main cause of acid rain according to environmental groups?

• Burning of fuels in power stations

• Natural forest fires

• Burning of plastics

• Volcanic eruptions