6.1 Acids and Alkalis

Acids taste:

• fishy

• salty

• sour

• sweet

The name of an acid in lemon juice is:

• citric acid

• ethanoic acid

• lemonic acid

• sulfuric acid

You can prevent acids from splashing into your eyes by wearing:

• an overall

• gloves

• long hair tied back

• safety spectacles.

What does this sign mean?

• corrosive

• explosive

• flammable

• toxic

Which one of these is an acid?

• oven cleaner

• salt water

• pure water

• vinegar

Which one of these is an alkali?

• lemon juice

• oven cleaner

• sugar solution

• vinegar

Red cabbage can be used as an indicator because it:

• changes colour

• comes from a plant

• is an acid

• is an alkali.

The colour of litmus in sulfuric acid is:

• blue

• green

• purple

• red

The pH of pure water is:

• 1

• 5

• 7

• 11

The colour of universal indicator in a substance that is very acidic is:

• green

• orange

• purple

• red