States of Matter Practice Questions

Question 1

Q1. Knowledge Recall (1 mark)

Define the term "sublimation".

Question 2

Q2. Knowledge Recall (2 marks)

State the three states of matter and give an example of each.

Question 3

Q3. Application (2 marks)

Explain why ice floats on water.

Question 4

Q4. Application (3 marks)

Describe a real-life example of a gas dissolving in a liquid and explain the process.

Question 5

Q5. Calculations (3 marks)

Calculate the volume of a gas that has a mass of 2.8 g and occupies a volume of 1.2 dm³ at STP. The molar mass of the gas is 28 g/mol.

Question 6

Q6. Data Analysis (2 marks)

The table below shows the boiling points of four substances:

Substance

Boiling point (°C)

Ethanol

78

Water

100

Carbon dioxide

-78

Arrange the substances in order of increasing boiling point.

Question 7

Q7. Knowledge Recall (2 marks)

What is a hydrogen bond?

Question 8

Q8. Application (3 marks)

Explain why water has a relatively high boiling point compared to other liquids with a similar molecular mass.

Question 9

Q9. Calculations (3 marks)

Calculate the mass of potassium chloride (KCl) that is needed to prepare 500 g of a 5% mass-to-mass solution of KCl in water.

Question 10

Q10. Chemical Equations (3 marks)

Write a balanced chemical equation for the reaction between solid sodium (Na) and chlorine gas (Cl2) to form solid sodium chloride (NaCl).

Oxygen

-183

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