Change of the States of Matter 2

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Question 1 of 7

1. Question
1 point(s)
CHEM0202030

The graph above shows the change in temperature of a substance in a cooling process. The anomaly that shows in the circle is named as
- Plasma cooling
- Hyper cooling
- Over cooling
- Super cooling
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Question 2 of 7

2. Question
1 point(s)
CHEM0202040
Which of the following is not the precaution steps taken to prevent super cooling?
- Putting the test tube in a beaker that filled with cold water.
- Putting the test tube in a conical flask.
- Stir the liquid slowly all the time.
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Question 3 of 7

3. Question
1 point(s)
CHEM0202010

The diagram above shows the change of temperature of substance X when a solid of substance X is heated. Which of the following statements are correct about the experiment?
- I. Substance X exists only in liquid after 8 minute.
- II. Substance X begins to melt at 3 minute.
- III. The boiling point of substance X is 78°C.
- IV. Substance X exists as both a solid and a liquid in the fifth minute.
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Question 4 of 7

4. Question
1 point(s)
CHEM0202060

The graph shows the change in temperature of a liquid with time. In the beginning, the liquid is cooled to become solid. The solid is then heated again until it becomes liquid. At which state latent heat is absorbed?
- A to B
- B to C
- C to D
- D to E
- E to F
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Question 5 of 7

5. Question
1 point(s)
CHEM0202070
Substance X exists as a liquid at a temperature of 85°C. What is the most likely melting point and boiling point of substance X?

Melting point (^oC) Boiling point (^oC)

A -15 35

B -5 400

C 90 300

D 40 80
- A
- B
- C
- D
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Question 6 of 7

6. Question
1 point(s)
CHEM0202080
The melting point and boiling point of a substance Y is 10°C and 80°C respectively. Which of the statement below is not true about substance Y?
- Substance Y exists as solid at the temperature of 9 °C.
- Substance Y exists as liquid at room temperature.
- The particles of substance X are very far from each other at 100 °C.
- Vaporization of substance Y only happens at 80 °C.
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Question 7 of 7

7. Question
1 point(s)
CHEM0202090
The table below shows the meting point and boiling point of substances P, Q, R and S. Which of the substance is solid at room temperature (25 °C)
- P
- Q
- R
- S
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7. Question

	Melting point (^oC)	Boiling point (^oC)
A	-15	35
B	-5	400
C	90	300
D	40	80