Grade 1, 2, & 3 Chemistry: Free Trial*

G. 8 & 9

Chemistry

F. 1, 2, & 3

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G. 8 & 9 / F. 1, 2, & 3

Chemistry: Free Trial*

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1 / 10

1. If you reduce the volume of a gas...

A. The temperature falls

B. The pressure increases

C. It expands

D. It gets bigger

2 / 10

2. When a smell spreads, particles move away from where they originated. This is called...

A. Condensation

B. Dispersion

C. Evaporation

D. Diffusion

3 / 10

3. Which is the correct formula equation?

A. $Mg + O_{2} \longrightarrow MgO_{2}$

B. $2Mg + O_{2} \longrightarrow Mg_{2}O_{2}$

C. $2Mg + O_{2} \longrightarrow 2MgO$

D. $Mg + O \longrightarrow MgO$

4 / 10

4. The formula for methane is $CH_{4}$. Which of these is true?

A. A molecule of methane contains five different elements

B. Methane contains five molecules

C. A molecule of methane contains five atoms

D. An atom of methane contains two different elements

5 / 10

5. The name of the most likely compound that is formed when iron burns in sulphur is ...

A. iron sulphide

B. iron oxide

C. iron sulphate

D. sulphuric acid

6 / 10

6. Which of the following is the name for group 2 in the periodic table?

A. Alkali metals

B. Alkaline earth metals

C. Halogens

D. Noble gases

7 / 10

7. Alloys are mixtures of metals. Which is NOT an alloy?

A. Chromium

B. Brass

C. Solder

D. Bronze

8 / 10

8. The formula for copper nitrate is $Cu(NO_{3})_{2}$. This means it contains:

A. 2 copper atoms, 2 nitrogen atoms, and 3 oxygen atoms

B. 1 copper atom, 1 nitrogen atom, and 6 oxygen atoms

C. 2 copper atoms, 2 nitrogen atoms, 6 oxygen atoms

D. 1 copper atom, 2 nitrogen atoms, and 6 oxygen atoms

9 / 10

9. The formula for calcium hydroxide is $Ca(OH)_{2}$. This means it contains:

A. 1 calcium atom, 2 oxygen atoms, and 2 hydrogen atoms

B. 1 calcium atom, 1 oxygen atom, and 2 hydrogen atoms

C. 2 calcium atoms, 2 oxygen atoms, and 2 hydrogen atoms

D. 1 calcium atom, 2 oxygen atoms, and 1 hydrogen atom

10 / 10

10. The formula for potassium nitrate is $KNO_{3}$. This means it contains:

A. 3 potassium atoms, 3 nitrogen atoms, and 9 oxygen atoms

B. 1 potassium atom, 3 nitrogen atoms, and 3 oxygen atoms

C. 1 potassium atom, 1 nitrogen atom, and 3 oxygen atoms

D. 3 potassium atoms, 3 nitrogen atoms, and 3 oxygen atoms

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