# Properties of Solids & Liquids (KVPY (Kishore Vaigyanik Protsahan Yojana) Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics): Questions 8 - 12 of 15

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## Question number: 8

» Properties of Solids & Liquids » Temperature

MCQ▾

### Question

A body cools from 600 C to 550 C in t1 minutes, from 550 C to 500 C in t2 minutes and from 500 C to 450 C in t3 minutes. Then the relation between t1, t2 and t3 is –

### Choices

Choice (4) Response

a.

b.

c.

d.

Question does not provide sufficient data or is vague

## Question number: 9

» Properties of Solids & Liquids » Application of Surface Tension

MCQ▾

### Question

A air bubble is formed at the bottom of a lake. When the bubble rises to the surface, its radius increases 4 times. The depth of the lake at that spot is –

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 10

» Properties of Solids & Liquids » Application of Surface Tension

MCQ▾

### Question

A air bubble is formed at the bottom of a lake. When the bubble rises to the surface, its radius increases 3 times. The depth of the lake at that spot is –

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 11

» Properties of Solids & Liquids » Surface Energy and Surface Tension

MCQ▾

### Question

A hollow sphere has a small hole in it. On lowering the sphere in a tank of water, it is observed that water enters into the hollow sphere at a depth of 60 cm below the surface. Surface tension of water is. The diameter of the hole is,

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 12

» Properties of Solids & Liquids » Application of Surface Tension

MCQ▾

### Question

Two circular glass plates each of radius R = 15 cm are pressed together with a liquid film of thickness. Assuming that the liquid completely wets the glass plates, compute the force normal to plates required to pull them apart. S. T. of liquid = 0.070 N/m.

### Choices

Choice (4) Response

a.

3.95 N

b.

2.15 N

c.

4.25 N

d.

2.86 N

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