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Topics: Carbon dioxide, Oxygen, Magnesium Pages: 20 (2451 words) Published: September 22, 2014
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General Certificate of Secondary Education
Higher Tier
June 2012

Science A

CH1HP

H

Unit Chemistry C1

Chemistry

Unit Chemistry C1
Friday 15 June 2012

1.30 pm to 2.30 pm

Mark

1
2
3
4
5
6
7
8
TOTAL

For this paper you must have:
a ruler
the Chemistry Data Sheet (enclosed).
You may use a calculator.

Time allowed
1 hour
Instructions
Use black ink or black ball-point pen.
Fill in the boxes at the top of this page.
Answer all questions.
You must answer the questions in the spaces provided. Do not write outside the box around each page or on blank pages.
Do all rough work in this book. Cross through any work you do not want to be marked.
Information
The marks for questions are shown in brackets.
The maximum mark for this paper is 60.
You are expected to use a calculator where appropriate.
You are reminded of the need for good English and clear presentation in your answers.
Question 3(b) should be answered in continuous prose.
In this question you will be marked on your ability to:
– use good English
– organise information clearly
– use specialist vocabulary where appropriate.
Advice
In all calculations, show clearly how you work out your answer.

(JUn12CH1Hp01)

K84796

6/6/6

CH1HP

2

Do not write
outside the
box

There are no questions printed on this page

DO NOT WRITE ON THIS PAGE
ANSWER IN THE SPACES PROVIDED

(02)

G/K84796/Jun12/CH1HP

3

Do not write
outside the
box

Answer all questions in the spaces provided.

1

The diagrams show the electronic structure of four different atoms.

Atom A

Atom B

Atom C

Atom D

Use the Chemistry Data Sheet to help you to answer these questions. 1 (a)

Name the two sub-atomic particles in the nucleus of an atom. ............................................................................................................................................ (1 mark)

1 (b)

Why is there no overall electrical charge on each atom?
............................................................................................................................................ ............................................................................................................................................ (1 mark)

1 (c)

Why is Atom A unreactive?
............................................................................................................................................ (1 mark)

1 (d)

Which two of these atoms have similar chemical properties?
Give a reason for your answer.
............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ (2 marks)

____
5
Turn over

(03)

G/K84796/Jun12/CH1HP

4
2

Do not write
outside the
box

Rutile is an ore of titanium. Rutile contains titanium dioxide. The flow chart shows how titanium metal is extracted from titanium dioxide. Titanium dioxide

Chlorine

Reactor 1
Heat to 900 °C

Carbon
Carbon dioxide

Titanium chloride

Magnesium
Electrolysis

Magnesium chloride

Reactor 2
Heat to 1100°C
in an atmosphere
of argon and
allow to cool

Titanium metal

2 (a)

Titanium is much more expensive than iron.
Give one reason why....
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