2. Mixtures of substances can be separated using different techniques - Edexcel - GCSE Chemistry Combined Science - Question 2 - 2019 - Paper 1
Question 2
2. Mixtures of substances can be separated using different techniques.
(a) Which of the following is a mixture of substances?
A air
B carbon dioxide
C gold
D titan... show full transcript
Worked Solution & Example Answer:2. Mixtures of substances can be separated using different techniques - Edexcel - GCSE Chemistry Combined Science - Question 2 - 2019 - Paper 1
Step 1
Which of the following is a mixture of substances?
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Answer
The only correct answer is A, air. Air is a mixture of gases, including nitrogen, oxygen, carbon dioxide, and other trace gases.
Step 2
Give a reason why the bulb of the thermometer should be level with the side arm.
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Answer
The bulb of the thermometer should be level with the side arm to accurately measure the boiling point of the water vapor passing into the condenser. If the bulb is too low, it will not measure the correct temperature of the vapor, leading to inaccurate results.
Step 3
List the steps in the correct order.
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Answer
Put solvent in the beaker.
Draw a start line on the piece of paper.
Place the paper in the beaker.
Leave the solvent to rise up the paper.
Remove the paper when the solvent is near the top.
