FOUR. 5. FIVE. 6. TOTAL. 26/40. ASSESSOR'S USE ONLY. SCHOLARSHIP
EXEMPLAR. You should answer ALL the questions in this booklet. A periodic
table ...
S SCHOLARSHIP EXEMPLAR
New Zealand Scholarship Chemistry Time allowed: Three hours Total marks: 40
Question
Mark
ONE
3
TWO
6
You should answer ALL the questions in this booklet.
THREE
6
A periodic table is provided on page 2.
FOUR
5
FIVE
6
EXAMINATION BOOKLET
If you need more room for any answer, use the extra space provided at the back of this booklet. Check that this booklet has pages 2 – 26 in the correct order and that none of these pages is blank.
TOTAL
26/40
Assessor’s use only
YOU MUST HAND THIS BOOKLET TO THE SUPERVISOR AT THE END OF THE EXAMINATION.
Shows understanding of chemical principles but ideas are not coherently developed to answer the question. New Zealand Scholarship Chemistry Sample
New Zealand Scholarship Chemistry Sample
Some aspects of the response are incomplete and discussion lacks coherency and precision. New Zealand Scholarship Chemistry Sample
3
Response does not correctly apply equilibrium principles so the correct exothermic reaction is not identified. No reaction equation is provided. New Zealand Scholarship Chemistry Sample
Response is incorrect. New Zealand Scholarship Chemistry Sample
3
New Zealand Scholarship Chemistry Sample
Logical development of ideas, although explanation for solubility limited to polarity rather than the strength of the intermolecular forces. New Zealand Scholarship Chemistry Sample
New Zealand Scholarship Chemistry Sample
Calculations are mostly correct. Misconception is recognised but not well linked to the calculation / data. New Zealand Scholarship Chemistry Sample
6
Minor calculation error. All working shown is clearly set out. New Zealand Scholarship Chemistry Sample
Correct choice of reduction potentials to explain the observations but reasons lack clarity and no reaction equations included. New Zealand Scholarship Chemistry Sample
Disproportionation not recognised but correct choice of E° values to explain the observations. Discussion lacks clarity. New Zealand Scholarship Chemistry Sample
Reasons for stability at different pH values not recognised or discussed. New Zealand Scholarship Chemistry Sample
6
Correct buffer not identified but species present in lactic acid at pH = 7.4 correctly calculated. New Zealand Scholarship Chemistry Sample
New Zealand Scholarship Chemistry Sample
Correctly calculates [Ur] and [HUv] and justifies lack of precipitation. Calculation for pH at which stones form is incorrect. New Zealand Scholarship Chemistry Sample
5
New Zealand Scholarship Chemistry Sample
Correct isomers identified but choice of isomers A and B not justified and equation for Tollens’ reaction not balanced. Discussions for part (ii) are incomplete. New Zealand Scholarship Chemistry Sample
Shows understanding of the requirements for polymerisation. Answer would be enhanced by the inclusion of structured formulae to support the discussion. New Zealand Scholarship Chemistry Sample
6
S
OUTSTANDING SCHOLARSHIP EXEMPLAR
New Zealand Scholarship Chemistry Time allowed: Three hours Total marks: 40
Question
Mark
ONE
8
TWO
6
You should answer ALL the questions in this booklet.
THREE
5
A periodic table is provided on page 2.
FOUR
8
FIVE
5
EXAMINATION BOOKLET
If you need more room for any answer, use the extra space provided at the back of this booklet. Check that this booklet has pages 2 – 26 in the correct order and that none of these pages is blank.
TOTAL
32/40
Assessor’s use only
YOU MUST HAND THIS BOOKLET TO THE SUPERVISOR AT THE END OF THE EXAMINATION.
Response shows highly developed knowledge, a fluent and coherent development of ideas and good integration of basic principles with examples from the date given. New Zealand Scholarship Chemistry Sample
Response shows synthesis of ideas relating observations to equilibrium principles. Discussion would have been enhanced by the inclusion of the equilibrium equation. New Zealand Scholarship Chemistry Sample
Answer shows perception and insight in the analysis of the data to determine the temperature of the reaction. New Zealand Scholarship Chemistry Sample
8
New Zealand Scholarship Chemistry Sample
Coherent, well constructed discussion explains each aspect of the observations given. New Zealand Scholarship Chemistry Sample
New Zealand Scholarship Chemistry Sample
Correct method used for the calculation (minor transposition error) but discussion does not correctly identify the misconception in link to the calculation. New Zealand Scholarship Chemistry Sample
6
New Zealand Scholarship Chemistry Sample
Correct calculations, clear and concise working. New Zealand Scholarship Chemistry Sample
New Zealand Scholarship Chemistry Sample
New Zealand Scholarship Chemistry Sample
High-level discussion considers all possible aspects of the problem. Logical, precise development of ideas. Some equations in (i) are incomplete (use of ½ equations for all reactions). New Zealand Scholarship Chemistry Sample
8
Logical, well-developed ideas to justify choice of the buffer solution and species present in lactic acid at the given pH. New Zealand Scholarship Chemistry Sample
New Zealand Scholarship Chemistry Sample
Clearly laid out, well reasoned calculations show perception and insight into the data provided. New Zealand Scholarship Chemistry Sample
8
Four compounds correctly identified . Compound B is incorrect as it is not a stereoisome of Compound A. Hence discussion of choice of stereoisomes related to melting point is limited.
New Zealand Scholarship Chemistry Sample
Explanations are incomplete and lack clarity.
New Zealand Scholarship Chemistry Sample
Answer based on correct understanding of the requirements for polymerisation but would be enhanced by the structures of the compounds to illustrate the concepts discussed. New Zealand Scholarship Chemistry Sample
