2007 HKAL/HKASL Chemistry

Examination

Pau Chiu Wah

19.3.2004

2008(?) Implementation of NSS curriculum

1992 Implementation of AS curriculum

1994 First ASL examination1995 First exam of last CE syllabus

1997 First exam of current AL syllabus

2002 Introduction of Comprehension Q. in AL exam

2005 First exam of new CE syllabus

2007 First exam of new AL/ASL syllabuses

2011(?) First exam of NSS curriculum, last AL/ASL exam

2007 HKAL Chemistry Examination (finalised)

Written Examination (80%)

Paper 1 (3 hours)

Paper 2 (3 hours)

Practical Examination (20%)

Teacher Assessment Scheme

or

Practical Examination (3 hours) (private candidates only)

Paper 1Section A (60%) - short questions +

comprehension questionsSection B (20%) - questions on practical

chemistrySection C (20%) - essay questions - 1 out of 2 questions

Paper 2Section A (60%)

- structured questions on topics 1 to 10

- 3 out of 4 questions

Section B (40%)

- structured questions on topics 11 to 13

- 2 out of 3 questions

2007 HKASL Chemistry Examination

Written Examination (80%)

Paper 1 (1½ hours)

Paper 2 (1½ hours)

Practical Examination (20%)

Teacher Assessment Scheme

Paper 1 Section A (40% of Written Exam) - short questions - comprehension questions - practical chemistry - compulsory questions Section B (10% of Written Exam) - essay questions - 1 out of 2 questions

Paper 2 - structured questions (50% of

Written Exam) - 3 out of 4 questions

A Level AS Level

Paper 1

8:30 am

to

11:30 am

Paper 1

8:30 am to 10:00 am

Paper 2

1:30 pm

to

4:30 pm

Paper 2

1:30 pm to 3:00 pm

Sample Question Papers for AL and ASL Examinations

(will be circulated in June 2005)

Features of the Sample Papers

Standard reduction potentials will be provided (AL papers)

Most questions are extracted/modified from exam papers of previous years

A table highlighting the questions on the new topics will be provided

Paper 1 Q.3 (b) Drug development (Topic 13.2)

Q.6 (a) Synthetic polymers (Topic 13.1)

Q.10 Electrophilic substitution (Topic 12.3)

Paper 2 Q.1 (c) Solubility product and Nernst equation (Topics 6.2 and 6.3)

Q.2 (b) Buckminsterfullerene and Group IV elements (Topics 4.6 and 9.2)

Q.2 (d)(i)

Spontaneity of changes (topic 3.4)

Q.7 (c) Green chemistry (Topic 13.3)

Some sample questions

Paper 2 Q.2 (d)

Account for each of the following:

(i) NH4Cl(s) dissolves in water spontaneously even though the process is exothermic.

(ii) Although the reaction of H2(g) with O2(g) is a highly exothermic process, it does not readily at room temperaure.

(4 marks)

Question on spontaneity of Reactions

A question on drugs

NH

N

S

O

CH3

CH3

HO2CCH(CH2)3C

O

NH2

CO2H

A question on drugs

(i) Identify the chiral carbon atoms.

(ii) Which of the two amide linkages is more susceptible to acidic hydrolysis?

(iii)Why is the drug not taken together with fruit juices?

a penicillin

AL ASLNo. of expts.

requiredS6 >=15

S7 >= 8

>=13

( 2 years)

No. of assessment

marks

4A 4B 2C

(2 years)

7

(2 years)

Min. no. of assessments

S6: 2A 2B 1C

S7: 1A 1B 1C

Repeaters:

3A 3B 1C

First timers

and repeaters:2A 2B 1C

No. of full reports

First timer >=4

Repeater >=2

First timer >=3

Repeater >=2

Teachers Assessment Scheme