Acids and Alkalis

Which substance is an acid?

• Water

• Bleach

• Orange juice

• Washing powder

If you wanted to test a colourless and odourless substance at home, what household item could you use?

• Red cabbage water

• Bleach

• Water

• Vinegar

Which pH level indicates a strong alkali?

• 1-3

• 4-6

• 8-11

• 12-14

What does this hazard symbol mean?

• toxic

• flammable

• corrosive

• explosive

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.

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