Miss Essay

1353 Words Aug 18th, 2010 6 Pages
Surname Centre Number Candidate Signature

Other Names Candidate Number

For Examiner’s Use

General Certificate of Secondary Education June 2007 SCIENCE B Unit Chemistry C1 CHEMISTRY Unit Chemistry C1 Higher Tier Thursday 21 June 2007 1.30 pm to 2.15 pm CHY1H

H
For Examiner’s Use
Question Mark Question Mark

For this paper you must have: a ruler. You may use a calculator.

Time allowed: 45 minutes Instructions Use blue or black ink or ball-point pen. Fill in the boxes at the top of this page. Answer all questions. Answer the questions in the spaces provided. Do all rough work in this book. Cross through any work you do not want to be marked. Information The maximum mark for this paper is 45. The marks for questions are
…show more content…
.................................................................................................................................... (2 marks) (b) In the second stage copper oxide, CuO, is reduced using carbon. Describe and explain what happens during this reaction. ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. (2 marks)

G/M21768/Jun07/CHY1H

5 (c) During the third stage the copper can be purified as shown in the diagram. Negative electrode – Positive electrode +

LEAVE MARGIN BLANK

Pure copper

Copper sulfate solution

Impure copper

(i) What is the name of the type of process used for this purification? .................................................................................................................................... (1 mark) (ii) Give one use of purified copper. .................................................................................................................................... (1 mark) (d)

Related Documents