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General Certificate of Secondary Education Foundation Tier June 2011

1 2 3 4 5 6 7 TOTAL

Additional Science
Unit Chemistry C2

CHY2F

Chemistry

Unit Chemistry C2 Wednesday 25 May 2011
For this paper you must have:  the Data Sheet (enclosed). You may use a calculator.

F

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.

(Jun11CHY2F01)

G/J68916

6/6/6

CHY2F

2 Answer all questions in the spaces provided.

Do not write outside the box

1

The diagram shows how the atoms are bonded in ammonia.

H

N

H

H

1 (a) 1 (a) (i)

Draw a ring around the correct answer. The formula of an ammonia molecule is NH3 N3H NH3 (1 mark)

1 (a) (ii) The particles represented by the dots () and crosses (x) in the diagram are electrons neutrons protons (1 mark) 1 (a) (iii) The bonds between the nitrogen and hydrogen atoms in ammonia are covalent ionic metallic (1 mark)

(02)

G/J68916/Jun11/CHY2F

3 1 (b) Ammonia is made by reacting nitrogen with hydrogen in the Haber process. The equation for this reaction is shown below. nitrogen 1 (b) (i) + hydrogen

Do not write outside the box



ammonia

Use words from the box to complete the sentences.