Question 1

What is a compound? (Best definition)

Accepted Answer

Substance made of different atoms joined together

Answer

Substance made of more than one identical atoms joined together

Answer

Substance made of more than one atom joined together

Answer

Substance made of different atoms

Question 2

Which of these is a compound?

Accepted Answer

carbon dioxide

Answer

oxygen

Answer

nitrogen

Answer

helium

Question 3

Which of these is a compound?

Accepted Answer

water

Answer

mercury

Answer

silver

Answer

iron

Question 4

Which of these is a mixture? (assume 3 of them are pure)

Accepted Answer

air

Answer

gold

Answer

water

Answer

carbon dioxide

Question 5

Which of the statements about properties of a compound is true?

Accepted Answer

The compound has different properties to the elements that are in it

Answer

If a compound is a gas the elements its made of will be gases too

Answer

Compounds are always more dangerous than the elements they are made of

Answer

The compound has the same properties as the elements that are in it

Question 6

Which of the statements about composition of a compound is true?

Accepted Answer

The atoms in a compound are always in the same ratio e.g. 2:1

Answer

The atoms in a compound can be in any proportion

Answer

The atoms in a compound are sometimes in different ratios e.g. 2:1 or 3:1

Answer

There will always be less of the smallest atom in the compound

Question 7

Which of the statements about separation of a compound is true?

Accepted Answer

Compounds can only be separated by a chemical process i.e. a reaction

Answer

Compounds cannot be separated e.g. you cannot take the O out of CO2

Answer

Compounds can be separated by chemical and physical processes.

Answer

Compounds can only be separated by a physical process e.g. filtering

Question 8

What is a mixture? (Best definition)

Accepted Answer

Two or more substances that are close to each other but not chemically combined

Answer

Substance made of more than one atom joined together

Answer

Substance made of different atoms

Answer

Substance made of different atoms joined together

Question 9

Which of the statements about properties of a mixture is true?

Accepted Answer

Each substance in the mixture keeps its own properties

Answer

All the substances in the mixture have the same properties

Answer

The different substances in the mixture affect the properties of each other.

Answer

The mixture will have the properties of the most reactive substance in it

Question 10

Which of the statements about composition of a mixture is true?

Accepted Answer

Mixtures can have the different substances in any proportion

Answer

The proportion of different substances in a mixture remains constant

Answer

There will always be less of the smallest atom in a mixture

Answer

Mixtures always have the same ratio of atoms in them e.g. 2:1

Question 11

Which of the statements about separation of a mixture is true?

Accepted Answer

Mixtures can be separated by a physical process e.g. filtering

Answer

Mixtures cannot be seperated

Answer

It is always easier to separate a compound than a mixture

Answer

Mixtures can only be separated by a chemical process i.e. a reaction

Related quizzes

Related quizzes