Advanced Level Chemistry - XtremePapers

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Pearson Edexcel Centre Number

International Advanced Level

Candidate Number

Chemistry

Advanced Subsidiary Unit 1: The Core Principles of Chemistry

Thursday 9 January 2014 ? Morning Time: 1 hour 30 minutes

Candidates may use a calculator.

Paper Reference

WCH01/01

Total Marks

ttInstructions Use black ink or ball-point pen. Fill in the boxes at the top of this page with your name,

tt centre number and candidate number. Answer all questions. Answer the questions in the spaces provided ? there may be more space than you need.

ttInformation The total mark for this paper is 80. The marks for each question are shown in brackets

t ? use this as a guide as to how much time to spend on each question. Questions labelled with an asterisk (*) are ones where the quality of your written communication will be assessed ? you should take particular care with your spelling, punctuation and grammar, as

t well as the clarity of expression, on these questions. A Periodic Table is printed on the back cover of this paper.

Advice

t Read each question carefully before you start to answer it. t Keep an eye on the time. t Try to answer every question. t Check your answers if you have time at the end.

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P42986A

?2014 Pearson Education Ltd.

6/6/6/6/2/2/

*P42986A0124*

SECTION A Answer ALL the questions in this section. You should aim to spend no more than 20 minutes on this section. For each question, select one answer from A to D and put a cross in the box . If you change your mind, put a line through the box and then mark your new answer with

a cross .

1 Which of the following ions would be deflected least in a mass spectrometer? A 35Cl+ B 35Cl2+ C 37Cl+ D 37Cl2+ (Total for Question 1 = 1 mark)

2 The mass spectrum of an element is shown below.

60

Relative abundance 40

20

69

The relative atomic mass of the element is A 69.4 B 69.8 C 70.0 D 70.2

71 Mass/ charge ratio

(Total for Question 2 = 1 mark)

2

*P42986A0224*

3 In a mass spectrometer, positive ions are accelerated by A bombarding them with fast-moving electrons. B bombarding them with fast-moving protons. C passing them between charged plates. D passing them through a magnetic field. (Total for Question 3 = 1 mark)

4 The number of unpaired electrons in a nitrogen atom in its ground state is A 0 B 1 C 2 D 3 (Total for Question 4 = 1 mark)

Use this space for any rough working. Anything you write in this space will gain no credit.

*P42986A0324*

3

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5 Four sequences of ionization energies of elements, in kJ mol?1, are shown below. A 590 1145 4912 6474 8144 B 520 496 419 403 376 C 1000 1251 1521 419 590 D 631 658 650 653 717 (a) The sequence giving the first ionization energies of elements going down a Group in the Periodic Table is (1) A B C D

(b) The sequence showing the first five ionization energies of calcium is (1)

A B C D

(c) The sequence showing the first ionization energy of successive elements, in which atomic number increases by one each time, starting with an element in Group 6 is (1) A B C D

(Total for Question 5 = 3 marks)

4

*P42986A0424*

6 Which of the following ions has the smallest ionic radius? A Ca2+ B K+ C S2? D Cl? (Total for Question 6 = 1 mark)

7 A liquid, which conducts electricity, continues to conduct when it is cooled and solidified. Which of the following could it be? A Mercury B Bromine C Molten sodium chloride D Tetrachloromethane

(Total for Question 7 = 1 mark)

8 Calculate the number of atoms in one mole of hydrogen peroxide, H2O2. [The Avogadro constant, L = 6.0 ? 1023 mol?1] A 1.5 ? 1023 B 6.0 ? 1023 C 1.2 ? 1024 D 2.4 ? 1024 (Total for Question 8 = 1 mark)

9 When 0.1 mol of atoms of an element reacts with chlorine, there is an increase in mass of 7.1 g. The element could be A carbon. B sodium. C magnesium. D aluminium.

(Total for Question 9 = 1 mark)

*P42986A0524*

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