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 potassium nitrate is $KNO_{3}$. This means it contains:

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

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

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

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

2 / 10

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

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

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

3 / 10

3. A balloon is filled with gas. Inside the balloon the gas particles ...

A. Are moving very quickly

B. Are moving slowly

C. Are avoiding each other

D. Are not moving

4 / 10

4. When a solid changes to a liquid, it ...

A. Boils

B. Freezes

C. Melts

D. Condenses

5 / 10

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

A. $CCl_{4}$

B. $CCl_{3}$

C. $C_{3}Cl$

D. $C_{4}Cl$

6 / 10

6. The correct number of atoms in a molecule of copper sulphate ($CuSO_{4}$) is ...

A. 4

B. 3

C. 6

D. 7

7 / 10

7. Which of the following elements is the odd one out and why?

A. Helium because it is a very light element.

B. Krypton because it is used to kill superheroes.

C. Hydrogen because it is not a noble gas.

D. Neon because it is the only element that flashes on and off.

8 / 10

8. Which of the following is NOT a mixture?

A. Coca-cola

B. Milk

C. Methane

D. Crude oil

9 / 10

9. In a solution, the hotter the solvent ...

A. The slower the solute dissolves

B. The quicker the soluble solid dissolves

C. The less the solute dissolves

D. No more of the soluble solid dissolves

10 / 10

10. Strong acids and strong alkalis are ...

A. Able to turn blue litmus paper red

B. Sweet

C. Sour

D. Corrosive and/or caustic

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