States of Matter : Gases & Liquids Test 14

Question 1
1 / -0

Which of the following properties of water can be used to explain the spherical shape of rain droplets?

A
Viscosity

B
Surface tension

C
Critical phenomenon

D
Vapour pressure

Question 2
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How does the surface tension of a liquid vary with increase in temperature?

A
Remains same

B
Decreases

C
Increases

D
No regular pattern is followed

Question 3
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Arrange the following in increasing order of surface tension.
I (water), II (ethanol), III (hexane)

A
I < II < III

B
II < I < III

C
Ill < I < II

D
Ill < II < I

Question 4
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Some of the following properties of liquids arise because of the molecular interaction and thermal energy.
I. Vapour pressure II. Surface tension III. Viscosity
Select the properties.

A
I and II

B
I and III

C
II and III

D
I, II and III

Question 5
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One of the following properties increase with increase in temperature,

A
Viscosity

B
Surface tension

C
Vapour pressure

D
Density

Question 6
1 / -0

Which is equal to 1 kg m^-1 S^-1?

A
0.01 poise

B
0.001 poise

C
1 poise

D
10 poise

Question 7
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Surface tension of water is 73 dynes cm ^-1 at 20° C. If surface area is increased by 0.10 m², work done is

A
7.3 erg

B
7.3 x 10⁴erg

C
7.3 J

D
0.73 J

Question 8
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The coefficient of viscosity of a species is 2.10x 10^-5 Pa-s. This value is also equal to

A
2.10 x 10^-5 Nm^-2s

B
2.10 x 10^-5 kg m^-1s^-1

C
2.10 x 10^-4 poise

D
All of these

Question 9
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Direction (Q. Nos. 9) Choice the correct combination of elements and column I and coloumn II are given as option (a), (b), (c) and (d), out of which ONE option is correct.
Q. Match the physical properties given in Column I with the corresponding units given in Column II and select the correct answer from the codes given below.

A
a

B
b

C
c

D
d

Question 10
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Direction (Q. Nos. 10 and 15) This sectionis based on statement I and Statement II. Select the correct answer from the code given below
Q.
Statement I : Increase in temperature decreases viscosity of liquid.
Statement II : Increase in temperature and thus kinetic energy can overcome intermolecular forces of attraction.

A
Both Statement l and Statement II are correct and Statement Il is the correct explanation of Statement I

B
Both Statement I and Statement II are correct and Statement II is not the correct explanation of Statement I

C
Statement I is correct but Statement II is incorrect

D
Statement II is correct but Statement I is incorrect

Question 11
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Statement I : The order of viscosities o f hexane, water and glycerol is hexane < water < glycerol.
Statement II : Hexane has weakest intermolecular forces and glycerol the 1 strongest.

A
Both Statement l and Statement II are correct and Statement Il is the correct explanation of Statement I

B
Both Statement I and Statement II are correct and Statement II is not the correct explanation of Statement I

C
Statement I is correct but Statement II is incorrect

D
Statement II is correct but Statement I is incorrect

Question 12
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Statement I : Liquids tend to have maximum number of molecules at their surface.
Statement II : Small liquid drops have spherical shape.

A
Both Statement l and Statement II are correct and Statement Il is the correct explanation of Statement I

B
Both Statement I and Statement II are correct and Statement II is not the correct explanation of Statement I

C
Statement I is correct but Statement II is incorrect

D
Statement II is correct but Statement I is incorrect

Question 13
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Statement I : As temperature is increased, less work is required to extend the surface of a liquid therefore surface tension decreases.
Statement II : As the temperature and hence the intensity of molecular motion increases, intermolecular forces become less effective.

A
Both Statement l and Statement II are correct and Statement Il is the correct explanation of Statement I

B
Both Statement I and Statement II are correct and Statement II is not the correct explanation of Statement I

C
Statement I is correct but Statement II is incorrect

D
Statement II is correct but Statement I is incorrect

Question 14
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Statement I : Capillary action is due to surface tension.
Statement II : Mercury, with its strong cohesive forces and weaker adhesive forces, does not show capillary rise.

A
Both Statement l and Statement II are correct and Statement Il is the correct explanation of Statement I

B
Both Statement I and Statement II are correct and Statement II is not the correct explanation of Statement I

C
Statement I is correct but Statement II is incorrect

D
Statement II is correct but Statement I is incorrect

Question 15
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Statement I : A certain amount of energy called activation energy (E_a) is required to move into a hole.
Statement II : On increasing temperature, E_a is available and liquid can flow more easily thus, viscosity decreases.

A
Both Statement l and Statement II are correct and Statement Il is the correct explanation of Statement I

B
Both Statement I and Statement II are correct and Statement II is not the correct explanation of Statement I

C
Statement I is correct but Statement II is incorrect

D
Statement II is correct but Statement I is incorrect

Submit Test

States of Matte...

Question 1

Viscosity

Surface tension

Critical phenomenon

Vapour pressure

Question 2

Remains same

Decreases

Increases

No regular pattern is followed

Question 3

I < II < III

II < I < III

Ill < I < II

Ill < II < I

Question 4

I and II

I and III

II and III

I, II and III

Question 5

Viscosity

Surface tension

Vapour pressure

Density

Question 6

0.01 poise

0.001 poise

1 poise

10 poise

Question 7

7.3 erg

7.3 x 104 erg

7.3 J

0.73 J

Question 8

2.10 x 10-5 Nm-2s

2.10 x 10-5 kg m-1s-1

2.10 x 10-4 poise

All of these

Question 9

a

b

c

d

Question 10

Both Statement l and Statement II are correct and Statement Il is the correct explanation of Statement I

Both Statement I and Statement II are correct and Statement II is not the correct explanation of Statement I

Statement I is correct but Statement II is incorrect

Statement II is correct but Statement I is incorrect

Question 11

Both Statement l and Statement II are correct and Statement Il is the correct explanation of Statement I

Both Statement I and Statement II are correct and Statement II is not the correct explanation of Statement I

Statement I is correct but Statement II is incorrect

Statement II is correct but Statement I is incorrect

Question 12

Both Statement l and Statement II are correct and Statement Il is the correct explanation of Statement I

Both Statement I and Statement II are correct and Statement II is not the correct explanation of Statement I

Statement I is correct but Statement II is incorrect

Statement II is correct but Statement I is incorrect

Question 13

Both Statement l and Statement II are correct and Statement Il is the correct explanation of Statement I

Both Statement I and Statement II are correct and Statement II is not the correct explanation of Statement I

Statement I is correct but Statement II is incorrect

Statement II is correct but Statement I is incorrect

Question 14

Both Statement l and Statement II are correct and Statement Il is the correct explanation of Statement I

Both Statement I and Statement II are correct and Statement II is not the correct explanation of Statement I

Statement I is correct but Statement II is incorrect

Statement II is correct but Statement I is incorrect

Question 15

Both Statement l and Statement II are correct and Statement Il is the correct explanation of Statement I

Both Statement I and Statement II are correct and Statement II is not the correct explanation of Statement I

Statement I is correct but Statement II is incorrect

Statement II is correct but Statement I is incorrect

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Question Analysis

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7.3 x 10⁴erg

2.10 x 10^-5 Nm^-2s

2.10 x 10^-5 kg m^-1s^-1

2.10 x 10^-4 poise