Bases and Alkalis

What is a base?

• A substance that can react with acids and neutralize them

• A substance that dissolves in water

• A substance that can attack metals

• A substance that reacts with oils and fats

Which of the following is an example of a base?

• Copper oxide

• Sodium chloride

• Hydrochloric acid

• Carbon dioxide

Can copper oxide neutralize acids?

• Yes

• No

• It depends on the type of acid

• Not mentioned

Is sodium hydroxide a base?

• Yes

• No

• It depends on the pH level

• Not mentioned

Can sodium hydroxide dissolve in water?

• Yes

• No

• Only in small amounts

• Not mentioned

Is sodium hydroxide an alkali?

• Yes

• No

• It depends on the concentration

• Not mentioned

What do alkalis feel like on the skin?

• Dry

• Sticky

• Soapy

• Oily

Which household cleaners often contain sodium hydroxide?

• Window cleaners

• Toilet cleaners

• Drain cleaners

• Dishwashing liquids