Chemistry 1

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Centre Number Surname Other Names Candidate Signature

Candidate Number

For Examiner’s Use

Examiner’s Initials

Question

Mark

General Certificate of Secondary Education Higher Tier January 2012

1 2 3 4 5 TOTAL

Science B

Unit Chemistry C1

CHY1H

Chemistry
Written Paper

Unit Chemistry C1

H

Thursday 26 January 2012
You will need no other materials. You may use a calculator.

9.00 am to 9.45 am

Time allowed  45 minutes 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 45.  You are expected to use a calculator where appropriate.  You are reminded of the need for good English and clear presentation in your answers. 

Advice  In all calculations, show clearly how you work out your answer.

(Jan12CHy1H01)

K76507

6/6/6

CHY1H

2 Answer all questions in the spaces provided.

Do not write outside the box

1

Petroleum diesel is a fuel made from crude oil. Biodiesel is a fuel made from vegetable oils. To make biodiesel, large areas of land are needed to grow crops from which the vegetable oils are extracted. Large areas of forest are cleared by burning the trees to provide more land for growing these crops.

Leave as forest

Forest

Produce food

Burn the trees

Grow crops

Produce biodiesel

1 (a) 1 (a) (i)

Use this information and your knowledge and understanding to answer these questions. Carbon neutral means that there is no increase in the amount of carbon dioxide in the atmosphere. Suggest why adverts claim that using biodiesel is carbon neutral. ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ (2 marks)

(02)

G/K76507/Jan12/CHY1H

3 1 (a) (ii) Explain why clearing large areas of forest has an environmental impact on the atmosphere. ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ (2 marks) 1 (b) Why is there an increasing demand for biodiesel? ...............................................................................................................................................
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