Paper 1: Section 2- States of matter and mixture Flashcards
1
Q
What is evaporating?
A
Liquid — gas
2
Q
What is condensing?
A
Gas — liquid
3
Q
What is melting?
A
Solid — liquid
4
Q
What is freezing?
A
Liquid — solid
5
Q
When a solid turns straight into a gas on heating, without becoming a liquid first.
A
Sublimation
6
Q
When a gas turns straight into a solid, without becoming a liquid.
A
Deposition
7
Q
What is the chemical definition of purity?
A
8
Q
Why isn’t air considered a pure substance?
A
9
Q
If a substance melts over a range of temperatures, is it a pure or mixed substance?
A
10
Q
What is simple distillation?
A
11
Q
What is the purpose of filtration?
A
12
Q
What is the purpose of crystillation?
A
13
Q
What is chromatography?
A
14
Q
How do you calculate the RF value?
A
15
Q
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A
