set 12 MCQ Questions & Answers Detailed Explanation

Question : 1

Heat is transmitted from higher to lower temperature through actual mass motion of the molecules in

a) radiation

b) conduction

c) convection

d) none of these

Question : 2

Which of the following represents convection ?

a) Heating water by keeping the vessel on a flame

b) Land breeze

c) Exhaust fan

d) All of these

Question : 3

Sky is blue because

a) Blue colour is more absorbing to eyes

b) Short waves are scattered more than long waves by atmosphere

c) Blue colour in the Sunlight is more than other colours

d) Atmosphere absorbs long wavelength more than short wavelength

Question : 4

Which one among the following has the highest energy?

a) Red light

b) Green light

c) Blue light

d) Yellow light

Question : 5

Which of the following statements is/ are true?

1. Absolute zero temperature is zero energy temperature.
2. Two different gases at the same temperature pressure have equal root mean square velocities.
3. The root mean square speed of the molecules of different ideal gases, maintained at the same temperature are the same.
4. Given sample of 1cc of hydrogen and 1 cc of oxygen both at NTP; oxygen sample has a large number of molecules.

a) 1, 3 and 4

b) 2 and 3

c) 1 only

d) 2, 3 and 4

Question : 6

Consider the following natural phenomena:

1. Terrestrial heating
2. Reflection of light
3. Refraction of light
4. Diffraction of light

a) 1 and 3

b) 1 and 2

c) 2, 3 and 4

d) 4 only