Varied Topic Questions, Exercises of Chemistry

Varied Topic Questions Great for Practice in OCR

Typology: Exercises

2025/2026

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OCR A Level Chemistry A
Practical Questions – Gas Tests, Group 2 and Acids
Total marks: 25
Question 1 – Reaction of a Group 2 Metal
with Acid (6 marks)
A student reacts a small piece of magnesium ribbon with dilute hydrochloric acid.
(a)
Write the balanced equation for this reaction.
(2 marks)
(b)
Name the gas produced.
(1 mark)
(c)
Describe the test for this gas and the observation.
(2 marks)
(d)
State two observations the student would see during the reaction.
(1 mark)
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OCR A Level Chemistry A

Practical Questions – Gas Tests, Group 2 and Acids

Total marks: 25

Question 1 – Reaction of a Group 2 Metal

with Acid (6 marks)

A student reacts a small piece of magnesium ribbon with dilute hydrochloric acid.

(a)

Write the balanced equation for this reaction. (2 marks)

(b)

Name the gas produced. (1 mark)

(c)

Describe the test for this gas and the observation. (2 marks)

(d)

State two observations the student would see during the reaction. (1 mark)

Question 2 – Carbonate and Acid

Reaction (6 marks)

A student adds dilute hydrochloric acid to solid calcium carbonate.

(a)

Write the balanced equation for the reaction. (2 marks)

(b)

Identify the gas produced. (1 mark)

(c)

Describe the chemical test for this gas. (2 marks)

(d)

State the observation seen in this test. (1 mark)

Question 3 – Limewater Investigation (

marks)

A student bubbles a gas produced from heating magnesium carbonate through limewater.

Write the balanced equation for this reaction. (2 marks)

(b)

Identify the gas produced. (1 mark)

(c)

Describe the test for this gas. (2 marks)

(d)

Explain why calcium hydroxide solution formed is alkaline. (1 mark)

Total: 25 marks