National 5ChemistrySQAExam QuestionsChemical Changes & StructureRates of Reaction

Rates of Reaction (SQA National 5 Chemistry): Exam Questions

Exam code: X813 75

5 mins5 questions
1
1 mark

An experiment was carried out to investigate the rate of a reaction.

In the first 5 minutes the pressure decreased by 0.6 bar.

The unit for the average rate of this reaction is

  • bar/min-1

  • bar min-1

  • min/bar

  • min bar-1

Choose your answer

2
1 mark

The average rate of a chemical reaction was calculated to be 5 cm3 s -1 for the first 60 s of the reaction.

What volume of gas was collected in the first 60 s of the reaction?

  • 0.08 cm3

  • 12 cm3

  • 55 cm3

  • 300 cm3

Choose your answer

3
1 mark

This Question refer to an experiment to investigate the rate of a reaction.
The volume of gas collected in 2 minutes was 5 cm3 .

What was the average rate of reaction over this time?

  • 0·2

  • 0·4

  • 2·5

  • 5·0

Choose your answer

4
1 mark

This Question refer to an experiment to investigate the rate of a reaction.
The volume of gas collected in 2 minutes was 5 cm3 .

The unit for the average rate of this reaction is

  • cm3 /min−1

  • cm3 min−1

  • min/cm3

  • min cm−3

Choose your answer

5
1 mark

Which of the following changes would not speed up a chemical reaction?

  • Increasing the particle size

  • Increasing the temperature

  • Increasing the concentration

  • Addition of a catalyst

Choose your answer