WorksheetsYear 7 Acids and Alkalis
Total questions: 20
Worksheet time: 10mins
What colour does litmus paper turn when added to an alkali?
Blue
Red
Green
Colourless
What colour does litmus paper turn when added to an acid?
Blue
Red
Green
Colourless
What other laboratory substance can you use to test if colourless substance is an acid or an alkali?
Catalyst
Salt
Universal Indicator
Water
What happens to the pH of an acid during neutralisation?
It stays the same
It moves toward pH 1
It moves towards pH 7
It moves towards pH 14
A wasp sting is alkali. Which substance would neutralise the sting?
Vinegar
Bleach
Baking soda
Distilled water
Which substance is an acid?
Water
Bleach
Orange juice
Washing powder
Which pH levels indicated a strong acid?
1-3
4-6
8-11
12-14
Which pH level indicates a weak alkali?
1-3
4-6
8-11
12-14
Which pH level indicates a weak acid?
1-3
4-6
8-11
12-14
Which pH level indicates a strong alkali?
1-3
4-6
8-11
12-14
Strong acids and alkalis are...
Sour
Sweet
Corrosive/Caustic
Burn litmus paper
PH scale
pH ruler
pH scale
pH statistical tables
What is the meaning of the above hazard warning symbol?
Corrosive
Explosive
Toxic
Radioactive
Acid in our stomach:
Hydrochloric acid
Sulfuric acid
Acetic acid
Carbonic acid
Which substance is alkali?
Toothpaste
Vinegar
Lemon juice
Soft drink
Which substance is avid?
Toothpaste
Vinegar
Soap
Ammonia
Reaction between acid and alkali producing salt and water:
Combustion
Neutralization
Precipitation
Decomposition
