WorksheetsChapter 4 Acids and Alkalis
Total questions: 22
Worksheet time: 11mins
What colour does litmus paper turn when added to an alkali?
Blue
Red
Green
Colourless
What chemical can you use to test if colourless substance is an acid or an alkali?
Catalyst
Salt
Indicator
Water
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
Acids taste...
Sweet
Salty
Sour
Smooth
Alkalis feel...
Rough
Granulated
Soapy
Smooth
What does this hazard symbol mean?
toxic
flammable
corrosive
explosive
Acid in our stomach:
Hydrochloric acid
Sulfuric acid
Acetic acid
Carbonic acid
Acid in soft drink:
Hydrochloric acid
Sulfuric acid
Acetic acid
Carbonic acid
The color of universal indicator in pure water:
Red
Blue
Purple
Green
Indigestion can be treated by drinking ....
water
antacid
vinegar
sodium hydroxide
Which substance is alkali?
Toothpaste
Vinegar
Lemon juice
Soft drink
What type of reaction occurs when you react an acid with an alkali?
combustion
decomposition
no reaction
neutralisation
Where does the acid in your mouth come from?
From stomach
From stomach acid
From the millions of
bacteria of mouth
From the teeth
What method is used to study the neutralisation reaction between an acid and an alkali in the laboratory?
Evaporation
Titration
Sublimation
Electrolysis
If pH is 2, and you are using the indicator methyl orange, what color would you see?
yellow
red
blue
colorless
Which solution can turn phenolphthalein pink?
vinegar
coffee
water
bleach
What colour does litmus paper turn when added to an acid?
Blue
Red
Green
Colourless
