set 2 MCQ Questions & Answers Detailed Explanation

Question : 1

A drop of oil is placed on the surface of water. Which of the following statements is correct?

a) It will spread as a thin layer

b) It will remain on it as a sphere

c) It will partly be a spherical droplet and partly a thin film

d) It will float as a distorted drop on the water surface

Question : 2

In automobile hydraulic brakes work on

a) Newton’s law of motion

b) Bernoulli’s Principle

c) Archimedes Principle

d) Pascal’s Law

Question : 3

A boy carries a fish in one hand and a bucket of water in the other hand. If he places the fish in the bucket, the weight now carried by him.

a) is more than before

b) is less than before

c) is the same as before

d) depends upon his speed

Question : 4

Consider the following statement. If there were no phenomenon of capillarity.

1. It would be difficult to use a kerosene lamp then.
2. One would not be able to use a straw to consume a soft drink.
3. The blotting paper would fail to function.
4. The big trees that we see around would not have grown on the Earth.

a) Only 1, 3 and 4

b) Only 2 and 4

c) Only 1, 2 and 3

d) Only 1, 2, 3 and 4

Question : 5

While floating in a sea what part of an iceberg is above the surface of the sea?

a) 1/10

b) 1/6

c) 1/9

d) 1/4

Question : 6

Which of the following materials is most elastic ?

a) Lead

b) Rubber

c) Wood

d) Steel