Year 7 practice questions 1 - Phoenix Hoyle | Library

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Which sample is pure ______ 
Which sample is a mixture ______ 
Which dye colour is most soluble _________ 
Which dye colour is least soluble ___________ 

Other Answer Choices:

A

purple

yellow

B

blue

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Use the simulation to work out the Rf values for the three dyes.
(Note that the water moves to 7.0cm).

Rf = distance moved by sample / distance moved by solvent
Rf Yellow =   ________  / ______ 
Rf value = _________
Rf purple = ________  / ______ 
Rf purple = _________ 
Rf blue = ________ / ______ 
Rf Blue = _________ 

Other Answer Choices:

0.87

0.50

3.5

6.1

2.7

0.39

7

1

3

How many types of atom are there ______
How many atoms are there in total ______  
This is a _____________ 

Other Answer Choices:

9

element

compound

mixture

3

1

3

A) is a(n) _____________ 
B) is a(n) ____________ 
C) is a(n) ____________ 

Other Answer Choices:

mixture

element

compound

1

4

Properties of solids liquids and gases

Other Answer Choices:

4

1

2

3

1

Which diagram shows elements combining to make a compound?

1

C2H5OH

1

4

Q
S
P
R

Monatomic element
diatomic compound
mixture of monatomic elements
diatomic element

4

Other Answer Choices:

Simple distillation

Filtration

Chromatography

Fractional distillation

5

Independent variable = _________
Dependent variable = ________________
A possible control variables = _______________________ 
What would be plotted on the x-axis = _________ (s).
What would be piloted on the y-axis =  ________________(°C) 

Other Answer Choices:

temperature

how much stirrring

time