Acids and Alkalis
The acid found in lemons is citric acid.

Acids and Alkalis

This Science quiz is called 'Acids and Alkalis' and it has been written by teachers to help you if you are studying the subject at middle school. Playing educational quizzes is a fabulous way to learn if you are in the 6th, 7th or 8th grade - aged 11 to 14.

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As a Science student, you will be familiar with using pH indicators to tell whether a substance is acidic, alkaline or neutral.

See how much you have learned by trying this quiz dealing with Acids and Alkalis.

1.
What color is universal indicator in strong acid?
Green
Orange
Purple
Red
2.
Which of the following acids do we have in our stomach?
Ethanoic acid
Hydrochloric acid
Nitric acid
Sulphuric acid
The acid kills bacteria
3.
Which of the following substances contain an alkali?
Baking powder
Coca cola
Distilled water
Vinegar
4.
Which of the following pH numbers indicates a neutral substance?
1
5
7
14
5.
Which of the following substances contain acid?
An orange
Bleach
Distilled water
Washing powder
Citrus fruit (oranges, lemons etc) contain citric acid
6.
What color is universal indicator in a strong alkali?
Green
Orange
Purple
Red
7.
Which of the following pH numbers indicates a strong acid?
1
5
7
14
8.
Which of the following pH numbers indicate a strong alkali?
1
5
9
14
Hydrangea flowers can be blue or pink depending on the pH of the soil
9.
What color is universal indicator in a neutral solution?
Green
Orange
Purple
Red
10.
Strong acids and strong alkalis are.......
Able to turn blue litmus paper red
Corrosive and/or caustic
Sour
Sweet
Author:  Sue Davison

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