Mark Scheme November 2007 - Edexcel

[Pages:36]Mark Scheme November 2007

IGCSE

IGCSE Chemistry (4335)

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November 2007 All the material in this publication is copyright ? Edexcel Ltd 2007

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1. Paper 1F 2. Paper 2H 3. Paper 3

Contents

4 19 31

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CHEMISTRY 4335, November 2007, MARK SCHEME

Key

/

indicates alternatives

eq allow for correct equivalent

__ word underlined means no alternatives allowed

Paper 1F

Question Number 1

Question

(a) Acceptable Answers 8

Notes

Question Number 1

Question

(b) Acceptable Answers 6

Notes

Question Number 1

Question

(c) Acceptable Answers Si

Notes

Question Number 1

Question

(d) Acceptable Answers N

Notes

Reject Reject Reject Reject

Mark (1)

Mark (1)

Mark (1)

Mark (1)

4

Question Number 1

Question

(e) Acceptable Answers 6

Notes

Question Number

2

Question

(a) Acceptable Answers Protons / electrons

Notes

Question Number

2

Question

(b) Acceptable Answers Neutrons

Notes

Question Number

2

Question

(c) Acceptable Answers Elements

Notes

Question Number

2

Question

(d) Acceptable Answers Compounds

Notes

5

Reject

Mark

(1) Total 5 marks

Reject

Mark

(1)

Reject

Mark

(1)

Reject

Mark

(1)

Reject

Mark

(1)

Question Number

2

Question

(e) Acceptable Answers Electrons

Notes

Question Number

2

Question

(f) Acceptable Answers Carbon

Notes

Question Number

3

Question

(a) Acceptable Answers Distillation

Notes

Question Number 3

Question

(b) Acceptable Answers Crystallisation / evaporation

Notes

Question Number 3

Question

(c) Acceptable Answers Filtration/ decantation

Notes

6

Reject

Mark

(1)

Reject

Mark

(1) Total 6 marks

Reject Fractional distillation

Mark (1)

Reject

Mark

(1)

Reject

Mark

(1)

Question Number 3

Question

(d) Acceptable Answers Chromatography

Notes

Question Number 3

Question

(e) Acceptable Answers Fractional distillation

Notes

Question Number 4

Question Number 4

Question

(a)

Acceptable Answers

s

l

aq g

Notes 4 correct = 2, 3/2 correct = 1 and 1/0 correct = 0.

Question

(b) Acceptable Answers

? Fizzing/effervescence/bubbles ? Moves/darts about ? Gets smaller /Disappears ? Floats

Notes Max 2.

Reject

Mark

(1)

Reject

Mark

Distillation

(1) Total 5 marks

Reject

Mark

(2)

Reject Reference to flames.

Reject `dissolves'

Mark

(2)

7

Question Number 4

Question

(c) Acceptable Answers Lithium

Notes

Reject Li

Mark (1)

Question Number 4

Question Number 5

Question (d) Acceptable Answers (add) red litmus/universal indicator turns blue. Allow `purple' for UI Notes

Question

(a) Acceptable Answers brown / red-brown/ orange-brown/ foxy brown

Notes

Reject

Mark

(2) Total 7 marks

Reject Rusty Orange Red

Mark (1)

Question Number 5

Question

(b) Acceptable Answers air / oxygen water/ moisture/ dampness

Notes

Question Number 5

Question

(c) Acceptable Answers iron (III) oxide accept iron oxide

Notes Ignore reference to hydrated

Reject

Mark

(2)

Reject

Mark

(1)

8

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