set 6 MCQ Questions & Answers Detailed Explanation

Question : 1

Consider the following statements.

1. If magenta and yellow coloured circles intersect, the intersected area will have a red colour.
2. If cyan and magenta coloured circles intersect, the intersected area will have a blue colour.

a) Both 1 and 2

b) Only 2

c) Only 1

d) Neither 1 nor 2

Question : 2

FM broadcasting service uses the range of frequency bands between

a) 76-87 MHz

b) 54-75 MHz

c) 109-139 MHz

d) 88-108 MHz

Question : 3

Gases exert pressure on the walls of the container because the gas molecules

a) have finite volume

b) possess momentum

c) collide with each other

d) obey gas laws

Question : 4

Consider the following three statements

1. Heating 1 kg of water from 10°C to 50°C
2. Melting 600 g of ice at 0°C
3. Converting 300 g of ice at 0°C to water at 50°C

a) 2, 1, 3

b) 1, 2, 3

c) 3, 2, 1

d) 3, 1, 2

Question : 5

On adding common salt to water, the boiling point and freezing point of water will

a) Decrease

b) Decrease and increase respectively

c) Increase

d) Increase and decrease respectively

Question : 6

Consider the following statements :

1. The shock waves produced by a supersonic aircraft do not have much intensity.
2. The speed of sound is maximum in solids.
3. A bat emits ultrasonic waves.
4. Sound waves of frequency below audible range are termed as ultrasonic.

a) 2 and 3

b) 1, 2 and 3

c) 1, 3, and 4

d) 1 and 4