Properties of Solids & Liquids (NEET Physics): Questions 64 - 68 of 188

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Question number: 64

» Properties of Solids & Liquids » Application of Surface Tension

MCQ▾

Question

The temperature at which the surface tension of water is zero

(1) 370° C

(2) 0° C

(3) Slightly less than 647 K

(4) 277 K

select the correct answers and mark it according to the following codes:

Choices

Choice (4) Response
a.

2 and 4 are correct

b.

1, 2 and 3 are correct

c.

1 and 2 are correct

d.

1 and 3 are correct

Question number: 65

» Properties of Solids & Liquids » Elastic Behavior

MCQ▾

Question

The work done in increasing the length of a one meter long wire of cross-sectional area 1mm 2 through 1mm will be

(Y = 3 × 10 11 N/m 2)

Choices

Choice (4) Response
a.

10 J

b.

0.1 J

c.

250 J

d.

0.15 J

Question number: 66

» Properties of Solids & Liquids » Latent Heat

Assertion-Reason▾

Assertion (Ꭺ)

Latent heat of fusion of ice is 336000 J kg -1

Reason (Ꭱ)

Latent heat refers to change of state without any change in temperature.

Choices

Choice (4) Response
a. Both Ꭺ and Ꭱ are false
b. Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ
c. Ꭺ is false but Ꭱ is true
d. Ꭺ is true but Ꭱ is false

Question number: 67

» Properties of Solids & Liquids » Elastic Behavior

Assertion-Reason▾

Assertion (Ꭺ)

Steel is more elastic than rubber.

Reason (Ꭱ)

Under given deforming force, steel is deformed less than rubber.

Choices

Choice (4) Response
a. Ꭺ is true but Ꭱ is false
b. Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ
c. Both Ꭺ and Ꭱ are false
d. Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

Question number: 68

» Properties of Solids & Liquids » Application of Surface Tension

Assertion-Reason▾

Assertion (Ꭺ)

A large soap bubble expands while a small bubble shrinks, when they are connected to each other by capillary tube.

Reason (Ꭱ)

The excess pressure inside bubble (or drop) is inversely proportional to the radius.

Choices

Choice (4) Response
a. Ꭺ is false but Ꭱ is true
b. Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ
c. Both Ꭺ and Ꭱ are false
d. Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

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