Form 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. Air is a mixture of different gases. Which list consists of gases present in the air?

A. Nitrogen, hydrogen, carbon dioxide

B. Hydrogen, oxygen, carbon dioxide

C. Nitrogen, oxygen, carbon dioxide

D. Nitrogen, oxygen, hydrogen

2 / 10

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

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

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

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

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

3 / 10

3. In the following reaction, which is the products

$Mg +2HCl \longrightarrow H_{2} + MgCl_{2}$ ?

A. Magnesium and hydrogen

B. Hydrogen and magnesium chloride

C. Hydrochloric acid and magnesium chloride

D. Magnesium and hydrochloric acid

4 / 10

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

A. There is often a temperature change

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

C. There is often a colour change

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

5 / 10

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

A. $C_{4}Cl$

B. $CCl_{4}$

C. $C_{3}Cl$

D. $CCl_{3}$

6 / 10

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

A. Condensation

B. Dispersion

C. Evaporation

D. Diffusion

7 / 10

7. When a gas changes to a liquid, it ...

A. Sublimes

B. Boils

C. Melts

D. Condenses

8 / 10

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

A. It gets bigger

B. The pressure increases

C. It expands

D. The temperature falls

9 / 10

9. Which of the following pH numbers indicates a strong acid?

A. 1

B. 5

C. 7

D. 14

10 / 10

10. What colour is a universal indicator in strong acid?

A. Orange

B. Green

C. Red

D. Purple

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