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

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

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

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

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

2 / 10

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

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

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

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

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

3 / 10

3. During a chemical reaction, new substances are formed from old ones. Which of the following is NOT ALWAYS true?

A. The total mass of products = total mass of reactants

B. There is often a temperature change

C. There is often a colour change

D. New substances can be changed back to the original ones

4 / 10

4. Which is the correct formula equation?

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

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

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

D. $Mg + O \longrightarrow MgO$

5 / 10

5. Which of these is NOT a compound?

A. Carbon monoxide

B. Chlorine

C. Hydrochloric acid

D. Propane

6 / 10

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

A. Bronze

B. Brass

C. Chromium

D. Solder

7 / 10

7. Which of the following pH numbers indicates a strong alkali?

A. 9

B. 5

C. 14

D. 1

8 / 10

8. Which of these statements about solids is true?

A. They can be compressed easily

B. They take the shape of their container

C. They have no definite volume

D. They do not flow

9 / 10

9. In the periodic table, what is a period?

A. A vertical line

B. A horizontal row

C. The left hand side

D. The middle block

10 / 10

10. What is listed in the Periodic Table?

A. Gases

B. Metals

C. Compounds

D. Elements

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