Question 1
Collision theory states that for a reaction to occur, particles must collide with sufficient energy and the correct orientation. Which factor does NOT increase the rate of a chemical reaction?
Correct Answer:
Decreasing the temperature
Question 2
A reaction produces 48 cm^3 of gas in 60 seconds. What is the average rate of reaction in cm^3/s?
Correct Answer:
0.8
Question 3
Which of the following best explains why powdered marble reacts faster with dilute hydrochloric acid than marble chips?
Correct Answer:
Greater surface area exposes more particles to collide
Question 4
A catalyst increases the rate of a reaction by:
Correct Answer:
Providing an alternative pathway with a lower activation energy
Question 5
In a reaction, 0.24 g of magnesium fully reacted in 30 s. What is the average rate in g/s?
Correct Answer:
0.008
Question 1
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About this Exam

Prepare with the National 5 Chemistry Practice Questions - National 5 Chemistry (C813 75) Exam practice quiz. This question bank includes 100 questions covering reaction, mass, formula, group, and rate. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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National 5 Chemistry Practice Questions - National 5 Chemistry (C813 75) Exam

This practice set contains 100 questions from the matching question bank and focuses on reaction, mass, formula, group, and rate. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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