Kertas Akhir Tahun Tingkatan 2

SMK KING EDWARD VII TAIPING PEPERIKSAAN AKHIR TAHUN _______________________________________________________________________ _

SCIENCE FORM 2 PAPER 1 I HOUR (40 marks) _______________________________________________________________________ _ DO NOT OPEN THE QUESTION PAPER UNTIL YOU ARE TOLD TO DO SO 1. 2. 3. 4. 5.

This question paper consists of 40 questions. Answer all questions Answer each question by blacking the correct space on the answer sheet. Blacken only one space for each question. If you wish to change your answer, erase the blackened mark that you have made. Then blacken the space for your new answer. 6. The diagrams in the questions provided are not drawn to scale unless stated. 7. You may use a non-programmable scientific calculator.

1

1

There is a class of food that consists of carbon, hydrogen, oxygen and nitrogen. Among the following, which is the function of the class of food mentioned, to human beings? A B C D

Main energy source Substance for building new cells Dissolves a certain vitamins in the body Protects the body against diseases

2

The diagram above shows tests for two classes of food. It is observed that red precipitate formed in test tubes X and Y. Therefore test tubes X and Y contain A B C D

X Y Protein and glucose Glucose and protein Starch and glucose Protein and starch

3

The diagram above shows a balanced diet. Among the following, which represents the class of food labelled X? A B C

Protein Fat Carbohydrate

2

D 4

Fibre

Solution X shows the characteristics below:

Among the following, which is X? A B C D

Limewater Sauce Vinegar Distilled water

5

The table above shows the test results of substance X. Among the following, which could possibly be substance X? A B C D 6

Toothpaste Soap Lime water Lime juice

When zinc is put into solution X, a gas that produces a 'pop' sound with a burning splint is released. Solution X could possibly be A B C D

ammonia hydrochloric acid water calcium hydroxide

3

7

On the diagram above, dilute hydrochloric acid is drained into the solution in the beaker until its colour becomes green. That new solution formed has all the following characteristics except that A B C D 8

it has pH value of 7 it produces salt crystal when evaporated the new solution is sodium chloride it is corrosive

The following are four processes that are involved in water treatment

Among the following sequences of the processes, which is correct in water treatment process? A B C D

Q, R, P, S P, Q, R, S Q, P, R, S R, Q, P. S

4

9

The diagram above shows the apparatus set-up of an experiment. Among the following, which is not correct? A B C D

This process is called distillation Steam will form inside the round-bottom flask The distillate contains mineral salt The distillate does not contain any suspended particles

10

The above diagram shows the process of electrolysis of water. What is the characteristic of gas X collected in the test tube? A B C D

Produces a 'pop' sound when tested with a lighted wooden splint Helps in burning Acidic in nature Has a pungent smell

5

11

The diagram above shows a graph of solubility of salt X in 100 ml of water versus temperature. What is the solubility of salt X at a temperature of 40 C? A B C D

30 g 40 g 60 g 100 g

12

The diagram above shows a little of substance X being put into substance Y in order to produce substance Z. Among the following, which represents the substances X, Y and Z? A B C D

X Solute Solvent Solvent Solution

Y Solvent Solution Solute Solute

Z Solution Solute Solution Solvent

6

13

Among the following, which shows the process of X that happens in the above equation? A B C D

Evaporation Decomposition Electrolysis Distillation

14

A drop of liquid is dropped on a piece of glass slide and then dried under the sunlight. At the end of the experiment, small white particles were found on the slide as shown in the diagram above. Among the following, which is the possible source of that liquid? A B C D

15

Seawater Rain water Well water River water

Seawater has a boiling point of over 100 a lot of I mineral salt II dissolved gases III micro-organism A I only B I and II only C II and III only D I, II, and III

C. This shows that sea water contains

7

16

Among the following chemicals, which is added to the water in a water treatment plant? I Alum II Lime III Chlorine A B C D

I only I and II only II and III only I, II, and III

17

The diagram above shows the stages in a water purification plant. Among the following, which substance is added in the coagulation and sedimentation tank? I Lime II Alum III Chlorine A B C D

18

I only I and II only II and III only I, II, and III

The gas pressure in a container increases when A B C D

the number of gas particles decreases the volume of the container is reduced the gas is cooled the volume of the container is increased

8

19

The following are the reasons causing the tin to become dented when it is heated until all the air is driven out and the cap tightly closed before cold water is poured over it except A B C D

20

Which of the following is not kept under high pressure? A B C D

21

cold water condenses the steam into water air pressure outside the tin which is higher pushes the tin inwards air pressure inside the tin decreases air pressure inside the tin increases

Perfume Hair spray Tomato sauce Insecticide

When using gas under high pressure, the safety measure taken is I gas cylinder should be kept far away from heat source II gas cylinder should not be placed in a closed place III gas cylinder must always be in an upright position A B C D

I only I and II only II and III only I, II, and III

9

22

Among the following tables, which is the most stable?

23

The chair in the diagram above can be made more stable by A B C D

lengthening its legs shortening its legs changing the seat to a bigger one increasing the weight of the seat

10

24

Among the following objects, which is the most stable?

25

The diagram above shows four wooden blocks, K, L, M and N. Those four blocks are put side by side on top of a plank. If the plank was tilted slowly, which wooden block will topple last? A B

K L

C D

M N

11

26

Among the following pairs of organisms with their types of support, which is correct?

27

The diagram above shows the support system on vertebrates and invertebrates. Among the following, which represents the support system for X, Y and Z? A B C D

X Buoyancy of water Hydrostatic skeleton Endoskeleton Hydrostatic skeleton

Y Hydrostatic skeleton Endoskeleton Buoyancy of water Turgidity of cell

Z Endoskeleton Turgidity of cell Hydrostatic skeleton Buoyancy of water

28

How could the aquatic plant in the above diagram be made to stand upright? I

Place it into a beaker of water

12

II III A B C D

29

Place it into a tin filled with sand Place it into a container filled with clay

I only I and II only II and III only I, II, and III

Among the following tools, which belongs to the same class of lever as a badminton racket? A B C D

Scissors Paper cutter Forceps Bottle opener

30

Among the following tools, which is classified under the same class of lever as the tool shown in the diagram above? A B C D

Pliers Wheelbarrow Fishing rod Bottle opener

31

13

The diagram above shows a bottle opener that is being used to open the lid of a bottle. Among the following, which is correct? A B C D

Fulcrum L N M N

Effort M L L M

Load N M N L

32

The diagram shows a student holding a book. Match P, Q and R with the correct class of lever.

33

The diagram above shows a lever that is balanced. What is the reading of the spring balance and what is the class of the lever?

14

34

Among the following, which correctly shows the model of the lever system for ice tongs?

35

Among the following, which needs an effort of 20 N so that the rod becomes balanced?

15

A B C D

I only I and II only II and III only I, II, and III

36

Among the following, which correctly shows the points of P, Q and R for the lever system in the diagram above? I

P - Fulcrum

16

A B C D

II

Q - Load

III

R - Effort

I only I and II only II and III only I, II, and III

37

Which of the following is true for this food chain? A B C D

The small fish is the primary consumer The sea lion is a herbivore The population of the small fish will increase if the population of the sea lion increases The seaweed population will decrease if the population of the small fish decrease

39

The figure above shows a food web. The secondary consumers are A bird and snake B bird only C snake only D eagle only

17

40

An experiment is carried out and it is observed that the part that is exposed to sunlight becomes dark blue when tested with iodine solution What is the conclusion of the experiment? A B C D

Photosynthesis requires chlorophyll Photosynthesis requires sunlight Photosynthesis requires carbon dioxide Photosynthesis requires water

QUESTION END

18