# KVPY (Kishore Vaigyanik Protsahan Yojana) Stream-SA (Class 11) Physics: Questions 224 - 229 of 253

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## Question number: 224

MCQ▾

### Question

A convex lens of focal length 39 cm and a concave lens of focal length 20 cm are placed in close contact with one another. The power of the combination is –

### Choices

Choice (4) Response

a.

0.41 D

b.

-2.43 D

c.

2.43 D

d.

-0.41 D

## Question number: 225

MCQ▾

### Question

The speed of the sound in a gas at S. T. P. is 337 ms-1 and the density of the gas is. The number of degree of freedom of a molecule of the gas is –

### Choices

Choice (4) Response

a.

424

b.

200

c.

375

d.

100

## Question number: 226

MCQ▾

### Question

8 identical water drops, carrying equal charge q and having the same potential V, merge together. The potential of the new water drop is –

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 227

MCQ▾

### Question

In a Young’s experiment, the interference pattern is found to have an intensity ratio between the bright and dark fringes as 16. The intensity ratio of the two interfering light waves is –

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 228

» Properties of Solids & Liquids » Heat Transfer » Convection

MCQ▾

### Question

275 g of ice is mixed with 175 g of water at temperature 900C. The latent heat of ice is 80 cal/g and the specific heat of water is 1 cal/g-0C. Assuming no heat loss to the environment, the amount of ice which does not melt is:

### Choices

Choice (4) Response

a.

0

b.

78.13 g

c.

52.36 g

d.

94.35 g

## Question number: 229

MCQ▾

### Question

If for a gas, The atomicity of the gas is-

### Choices

Choice (4) Response

a.

Monoatomic

b.

Cannot determine

c.

Triatomic

d.

Diatomic

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