Chemistry Past Paper

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SPECIMEN

H

GENERAL CERTIFICATE OF SECONDARY EDUCATION

B741/02

GATEWAY SCIENCE
CHEMISTRY B
Unit B741: Chemistry Modules: C1, C2, C3 (Higher Tier)

Candidates answer on the question paper
A calculator may be used for this paper
OCR Supplied Materials:
None

Duration: 1 hour 15 minutes

Other Materials Required:

Pencil

Ruler (cm/mm)

Candidate
Forename

Candidate
Surname

Centre Number

Candidate Number

INSTRUCTIONS TO CANDIDATES






Write your name clearly in capital letters, your Centre Number and Candidate Number in the boxes above.
Use black ink. Pencil may be used for graphs and diagrams only. Read each question carefully and make sure that you know what you have to do before starting your answer.
Answer all the questions.
Write your answer to each question in the space provided, however additional paper may be used if necessary.

INFORMATION FOR CANDIDATES


Your quality of written communication is assessed in questions marked with a pencil ().
The Periodic Table can be found on the back page.
The number of marks for each question is given in brackets [ ] at the end of each question or part question.
The total number of marks for this paper is 75.
This document consists of 20 pages. Any blank pages are indicated.

Examiner’s Use
Only:
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2

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1

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13

7
Total
© OCR 2011 [QN/600/1071/X]

OCR is an exempt Charity

Turn over

2
Answer all the questions
Section A – Module C1
1 This question is about esters.
Esters are useful substances. They can be used to make perfumes and solvents. (a)

Look at the list.
alcohol
alkane
polymer
protein
water
Complete the word equation to show how an ester is made.
Use words from the list.

acid

(b)

+

..................................

ester

+

.......................................

[1]

Perfumes and drugs can be tested on animals in some countries. Write about one advantage and one disadvantage of testing drugs on animals. ..................................................................................................................................................... ..................................................................................................................................................... ..................................................................................................................................................... ..................................................................................................................................................... ............................................................................................... ................................................. [2] [Total: 3]

© OCR 2011

SPECIMEN

3
2 Phil wants to choose a fuel to heat his house.

(a)

Two important factors Phil needs to think about when choosing a fuel are the cost of the fuel and the energy released per gram.
Suggest two other important factors which Phil needs to think about. ..................................................................................................................................................... ..................................................................................................................................................... ..................................................................................................................................................... ................................................................................................................................................ [2]

(b)

Look at the graph. It shows how the percentage of carbon dioxide in the air has increased.

Give two reasons why this has happened....
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