NEW
Font size
WorksheetsAcids and Alkalis
Total questions: 40
Worksheet time: 47mins
pH of Lemon
less than 7
more than 7
equal to 7
pH of bleach
less than 7
more than 7
equal to 7
Testing vinegar using litmus indicator, the colour turns _______
red
blue
purple
Testing ammonia solution using litmus solution, the colour turns ________.
blue
red
purple
Colour of phenolphthalein in alkaline solution
red
purple
Yellow
Pink
Colour of methyl orange in acidic solution
red
orange
yellow
pink
Neutralisation can be carried out using the _________ method.
titration
centrifugation
distillation
purification
Which of the following can tells us the pH value of a solution?
litmus solution
Universal indicator
methyl orange
phenolphthalein
Which of the following is acidic?
coffee
baking soda
toothpaste
detergent
Which of the following is alkali?
tomato
milk
stomach tablet
lemon
The pH of an acid is
7
more than 7
less than 7
between 1 to 14
Which one is correct about soap?
it is acidic
it is alkaline
it is neutral
The acid which is used to make fizzy drinks, is
citrus acid
acetic acid
citric acid
carbonic acid
The most accurate and quick measure of "pH" value is given by
indicator
pH scale
pH meter
universal indicator
Which statement is most likely to be TRUE?
Sodium bicarbonate is a weak harmless acid
sodium hydroxide is a harmful strong alkali
Sulphuric acid is not a corrosive acid
vinegar is a relatively harmless alkali
Coke is an alkali
true
false
pH paper, universal indicator and red cabbage indicator can all be used to
Determine whether something is corrosive or not
Determine whether something is an acid or alkali
Determine whether something is an element or not
Determine whether something is a mixture or compound
Acid taste sour
TRUE
FALSE
We can use ______ to discover the pH value of a liquid.
litmus indicator
methyl orange
phenolphthalein
Universal indicator
Which of the following 'fizzes' when acid is added to it?
bicarbonate of soda
potato chips
cooking salt
lemon juice
Which statement is most likely to be true?
Vinegar is a relatively harmless alkali.
Sodium bicarbonate is a weak harmless acid.
Sulphuric acid is not a corrosive acid.
Sodium hydroxide is a harmful strong alkali.
A lake is found to be too acidic to allow fish to live. Which substance could be added to the water reduce the acidity in the lake?
charcoal
artificial fertilizer
sodium hydroxide
quicklime
Which statements about acids and alkalis is TRUE?
aspirin is a weak alkali
antacids are weak alkali
spilled acids and alkalis are not made safer by diluting with water
acid are not safe enough to be used in food preparations because they are too sour tasting
Which statements about acids and alkalis is TRUE?
toothpaste can be weakly alkaline to neutralise plaque acid.
Oven spray cleaners can be strongly acidic.
Orange juice is a weak alkali.
Vinegar is a harmless weak alkali.
The symbol means a chemical is
harmful
corrosive
toxic
irritant
It helps to digest food.
Hydrochloric acid
Ascorbic acid
Omega-3 fatty acid
Ethanoic acid
It is also known as vitamin C.
Nitric acid
Ascorbic acid
Sulphuric acid
Hydrochloric acid
It flavor a fizzy drinks and acts as a preservative.
Methanoic acid
Carbonic acid
Ethanoic acid
Hydrochloric acid
It makes bee and ants stings painful.
Methonic acid
Nitric acid
Sulphuric acid
Ascorbic acid
Vinegar is a solution of ______.
Ethanoic acid
Sulphuric acid
Hydrochloric acid
Nitric acid
When an alkali is mixed with acid, neutralisation occurs because the
alkali cools down
acid evaporates
alkali chemically reacts with the acid
mass of the solution increases
An alkali is able to "cancel" out an acid. What is the chemical name for cancelling out the acid?
nullify
annihalate
neutralisation
overcome
In an experiment, some pupils found that baking soda had a pH of about 9. Some people claim this substance can be used to treat bee stings. Bee stings must be
acid
alkaline
neutral
life threatening
A student reacted hydrochloric acid with sodium hydroxide, until the solution was neutral. Next she evaporated the water from the beaker. She noticed that white crystals remained in the bottom of the beaker. The crystals were most likely
alkali
acid
water
salt
A purple colour when using universal indicator indicates the solution is
neutral
acidic
alkali
blackcurrent juice
What does lemon juice contain to make it acidic?
citric acid
hydrochloric acid
baking soda
sodium hydroxide
Milk of magnesia is a medicine used to treat indigestion. Milk of magnesia is most likely to be
alkali
neutral
from a cow
acidic
Which one is correct about soap?
It is acidic
It is alkali
It is neutral
Acidic food can be identified by what taste?
bitter
salty
sweet
sour
A beaker full of acid is steadily added to a beaker full of alkali. The pH of the alkali will
increase
change constantly
decrease
stay the same
