8/18/2019 TE1 CHP2 SM1(XIN) Chemistry - Marking Scheme

1/3

 

1

CHONG HWA INDEPENDENT HIGH SCHOOL

CHEMISTRY

SENIOR MIDDLE LEVEL 1 (XIN)

TOPICAL EVALUATION TEST 1

(CHAPTERS COVERED: 1-2)

PAPER 1

Question Answer Question Answer

1 C 6 C

2 D 7 C

3 B 8 B

4 B 9 B

5 B 10 B

PAPER 2 [SECTION A]

Question Mark Scheme Marks

Allocation

1(a) (i) Diffusion

(ii)  –  The particles move from higher to lower concentrationgradient

-  Until the equilibrium is reached

1 m

1 m

1 m

1(b) Molecule 1 m

1(c) Bromine is made up of tiny and discrete  particles

Diffuse upwards fast

Into the spaces between air

1 m

1 m

1m

1(d) -Less than 5 minutes

 Notes:o  The answer must be a figure

- Chlorine is lighter than bromine in term of molecular mass

1 m

1 m

TOTAL

9 MARKS

Question Mark Scheme Marks

Allocation

2(a) (i) solid

(ii) solid and liquid

(iii) liquid

(iv) liquid and gas

1 m

1 m

1 m

1 m

8/18/2019 TE1 CHP2 SM1(XIN) Chemistry - Marking Scheme

2/3

 

2

(v) gas 1 m

2(b) (i) Boiling

(ii) Heat energy absorbed

Overcome the forces of attraction between the particles

1 m

1 m

1 m

3(c) -  Closely packed in orderly manner-  Vibrate and rotate-  Strongest forces of attraction between particles-  Lowest energy content

( Any three) –  Max 3 marks

3 m

3(d) 1500oC 1 m

3(e) t4 1 m

TOTAL

13 MARKS

Question Mark Scheme Marks

Allocation

3(a) 12 1 m

3(b) 2.8.1 1 m

3(c) 1 m

(electronarrangement)

1 m(nucleus)

3(d) (i) N and P

(ii) They have the same proton number but different number of

neutrons// nucleon number.

(iii) Different nucleon number

(iv) Uranium-235

1 m

1 m

1 m

1 m

TOTAL

8 MARKS

7p

5n 

8/18/2019 TE1 CHP2 SM1(XIN) Chemistry - Marking Scheme

3/3

 

3

PAPER 2 [SECTION B]

Question Mark Scheme Marks

Allocation

1 X - Liquid- 

Closely packed in disorderly manner-  Vibrate, rotate and translate-  Weaker forces of attraction between particles as

compared to solid-  Higher energy content as compared to solid

X - Liquid-  Random arrangement / Particles are far apart from

each other-  Vibrate, rotate and translate

-  Weakest forces of attraction between particles as

compared to solid and liquid-  Highest energy content as compared to solid and liquid

1 m1 m1 m

1 m

1 m

1 m

1 m

1 m

TOTAL

8 MARKS

Prepared by:

…………………………………..MR. CHEONG BOON YAU

Chemistry Teacher (S.M.1 Ping)