Common Entrance Revision: 10 Easy and harder questions
KS3 Levels 4 and 5
Answer all 10 questions and then press ‘Submit’
Your score and any corrections will then be shown

1. What is the test for oxygen gas?

To see if it relights a glowing splint

Light it and see if it burns with a squeaky pop

Bubble it through limewater which will turn cloudy

To see if it turns anhydrous cobalt chloride from blue to pink

2. If hydrated copper sulphate is heated until it has all decomposed the solid product will: .....

weigh less than the original solid

be blue in colour

react with water to form a white compound

weigh more than the original solid

3. What is the unit for density

Newtons per square centimetre

Grams per cubic centimetre

Kilograms

Mass / Volume

4. What colour is sulphur?

Blue

Yellow

Black

White

5. Yeast, which is used to make bread, is a living organism
TRUE or FALSE

TRUE

FALSE

6. Name the waste gas that we breath out
(produced during respiration)

Hydrogen

Carbon dioxide

Nitrogen

Oxygen

7. Some plastic is bio readable.

What does biodegradable mean?

Rots away in the ground

Burns easily

Strong and doesn't tear easily

Waterproof

8. An acid would have what pH number?

More than pH 7

Less than pH 7

Equal to PH 7

9. Name a substance with a pH value more than pH7

Lemon juice

Water

Hydrochloric acid

Limewater

10. Which part of your skeleton protects the heart and lungs

Backbone

Femur

Ribs

Skull

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