AQA-CH2HP-QP-JUN12 - Centre Number For Examiners Use...

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General Certificate of Secondary Education Higher Tier June 2012 Additional Science CH2HP Unit Chemistry C2 Chemistry Unit Chemistry C2 Thursday 24 May 2012 9.00 am to 10.00 am 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 2(a) 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. CH2HP H (Jun12CH2HP01) G/J84031 6/6/6/6 Centre Number Candidate Number Surname Other Names Candidate Signature For Examiner’s Use Examiner’s Initials Question Mark 1 2 3 4 5 6 7 TOTAL
2 Do not write outside the box (02) G/J84031/Jun12/CH2HP Answer all questions in the spaces provided. 1 Icing on cakes is tested to check that safe colours were used when they were made. Paper chromatography is one method of testing which colours are in cake icing. 1 (a) The diagram shows an experiment a student did. Chromatography paper Lid Colouring from cake icing Safe food colours Solvent Container Start line 1 (a) (i) Suggest why there is a lid on the container. ............................................................................................................................................ ............................................................................................................................................ (1 mark) 1 (a) (ii) The start line should be drawn in pencil not in ink. Suggest why. ............................................................................................................................................ ............................................................................................................................................ (1 mark)
3 Do not write outside the box (03) G/J84031/Jun12/CH2HP Turn over

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