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What is a compound? Find out in this educational quiz.

Compounds

This Science quiz is called 'Compounds' 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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In Science terms, a chemical compound is a pure chemical substance consisting of two or more different chemical elements that can be separated into simpler substances by chemical reactions. There are literally billions of compounds!

1 .

A compound is a substance which contains .......

only one type of atom

only two types of atom

two or more chemicals which can be easily separated

two or more elements chemically joined together

2 .

The number of different elements in calcium carbonate (CaCO₃) is .......

Ca, C and O

3 .

Which of the following could have been formed by reacting iron with sulfur?

Iron oxide

Sulfuric iron

Iron sulfide

Sulphuric acid

There are two elements joining together so the name ends in -ide

4 .

The formula of methane is CH₄. Which of these is true?

A molecule of methane contains five atoms

A molecule of methane contains five different elements

An atom of methane contains two different elements

Methane contains five molecules

Methane exists as molecules and has two different elements

5 .

Which of these is NOT a compound?

Carbon monoxide

Chlorine

Hydrochloric acid

Propane

Chlorine is an element

6 .

How many atoms in the formula CuSO₄?

One Cu, one S, four O

7 .

The correct formula for carbon tetrachloride is .......

C₃Cl

C₄Cl

CCl₃

CCl₄

8 .

The smallest particle of carbon dioxide (CO₂) that still has the properties of carbon dioxide is called .......

a molecule

a proton

an atom

an ion

9 .

Which of these word equations is INCORRECT?

Copper + oxygen → copper oxide

Hydrogen + chlorine → hydrogen chlorine

Iron + chlorine → iron chloride

Magnesium + oxygen → magnesium oxide

10 .

Which is the correct formula equation?

Mg + O → MgO

Mg + O₂ → MgO₂ →

2 Mg + O₂ → Mg₂O₂

2 Mg + O₂ → 2 MgO

Author: Sue Davison

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