Year 7 practice questions 1

4

https://www.focuselearning.co.uk/s/1j5xuigz2riy

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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

Drugi mogući odgovor:

A

purple

yellow

B

blue

9

https://www.focuselearning.co.uk/s/1j5xuigz2riy

Use the simulation to work out the Rf values for the three dyes.

(Note that the water moves to 7.0cm).

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Rf = distance moved by sample / distance moved by solvent

Rf Yellow = /

Rf value =

Rf purple = /

Rf purple =

Rf blue = /

Rf Blue =

Drugi mogući odgovor:

0.87

0.50

3.5

6.1

2.7

0.39

7

1

A

B

C

D

1

A

B

C

D

3

How many types of atom are there

How many atoms are there in total

This is a

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Drugi mogući odgovor:

9

element

compound

mixture

3

1

A

B

C

D

1

A

B

C

D

1

A

B

C

D

1

A

B

C

D

1

A

B

C

D

1

A

B

C

D

3

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A) is a(n)

B) is a(n)

C) is a(n)

Drugi mogući odgovor:

mixture

element

compound

1

A

B

C

D

4

Properties of solids liquids and gases

Drugi mogući odgovor:

4

1

2

3

1

A

B

C

D

1

A

B

C

D

1

A

B

C

D

1

A

B

C

D

1

Which diagram shows elements combining to make a compound?

A

B

C

D

1

C₂H₅OH

A

B

C

D

1

A

B

C

D

4

S
P
R
Q

Monatomic element
diatomic compound
mixture of monatomic elements
diatomic element

4

Drugi mogući odgovor:

Simple distillation

Filtration

Chromatography

Fractional distillation

5

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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)

Drugi mogući odgovor:

temperature

how much stirrring

time

Year 7 practice questions 1

Which diagram shows elements combining to make a compound?

C2H5OH

Which diagram shows elements combining to make a compound?

C2H5OH

C₂H₅OH

C₂H₅OH