WorksheetsAcids and Alkali Quiz
Total questions: 40
Worksheet time: 20mins
A chemical reaction is a change in which atoms are rearranged to make new substances.
True
False
How do you know if a chemical reaction has taken place?
see huge flames or tiny sparks
notice a sweet smell or a foul stink
feel the substances getting hotter or colder
hear a loud bang or a gentle fizzing
Chemical reactions are useful to make many useful substances like:
All of these answers
Medicines, such as paracetamol
Fabrics, such as polyester
building materials, such as cement
A change that is reversible, in which new substances are not made.
Physical change
Chemical change
All changes are chemical reactions.
False
True
Example of a physical change
Change of state
Cooking an egg.
Mixing an acid with a base
Vomit, vinegar and lemon juice are all examples of...
Acids
Alkalis
Neutral solutions
Baking soda, Cleaning products, Soap, Toothpaste, Indigestion tablets are all examples of ...
Alkalis
Acids
Neutral solutions
What does this hazard symbol mean?
corrosive
flammable
toxic
irritant
What does this hazard symbol mean?
toxic
corrosive
flammable
irritant
What does this hazard symbol mean?
irritant
toxic
corrosive
flammable
What does this hazard symbol mean?
flammable
toxic
corrosive
irritant
A concentrated acid has _________ particles of acid per litre of water than a dilute acid.
more
the same number of
less
Acids taste...
Sour
Smooth
Salty
Sweet
Alkalis feel...
Soapy
Rough
Granulated
Smooth
Strong acids and alkalis are...
Corrosive
Sour
Sweet
What is used to tell if a substance is acid, alkaline or neutral?
an indicator
paper
a balance
a thermometer
If you wanted to test a colourless and odourless
substance at home, what household item could you use?
Red cabbage water
Bleach
Vinegar
Water
What colour does litmus paper turn when added to an alkali?
Blue
Red
Colourless
Green
What colour does litmus paper turn when added to an acid?
Red
Blue
Colourless
Green
What other laboratory substance can you use to test if colourless substance is an acid or an alkali?
Universal Indicator
Water
Salt
Catalyst
The pH scale is a measure of how acidic or alkaline a solution is.
True
False
Which pH levels indicated a strong acid?
1-3
4-6
12-14
8-11
Which pH level indicates a weak alkali?
8-11
1-3
4-6
12-14
Which pH level indicates a weak acid?
4-6
1-3
8-11
12-14
Which pH level indicates a strong alkali?
12-14
4-6
1-3
8-11
What happens to the pH of an acid during neutralisation?
It moves towards pH 7
It stays the same
It moves toward pH 1
It moves towards pH 14
A wasp sting is alkali. Which substance would neutralise the sting?
Vinegar
Bleach
Distilled water
Baking soda
Indigestion tablets are used to help with indigestion by neutralising stomach acid. What substances is in the medicine?
Alkali
Acid
Neutral
Complete this equation:
Acid + Alkali →
Salt + Water
Acid + Water
Acid + Alkali
Alkali + Water
Pure water has a pH of 7.
Pure water _______.
is a neutral substance
is a base
is an acid
could be either an acid or a base
Acid in our stomach:
Hydrochloric acid
Sulphuric acid
Carbonic acid
Acetic acid
What colour is universal indicator in strong acid?
Red
Orange
Green
Purple
______ is a substance with a
pH less than 7
Acid
Alkaline
Buffer
Base
_______ is a substance with a
pH greater than 7.
Alkali
Acid
Water
Buffer
What type of reaction occurs when you react an acid with an alkali?
neutralisation
decomposition
combustion
no reaction
A substance that neutralises an acid.
E.g : sodium hydroxide, calcium oxide
Base
Strong Acid
Water
Something that can
dissolve in water is said to be...
soluble
insoluble
What is the name for a soluble base?
alkali
acid
neutral solution
Farmers use lime to neutralise their acidic soils. What sort of substance is lime?
A base
An acid
A sharp tasting drink
