set 12 MCQ Questions & Answers Detailed Explanation

Question : 1

Which one of the following energy conversions takes place in carrying out the process of photosynthesis?

a) Thermal to biochemical energy

b) Light to thermal energy

c) Light to chemical energy

d) Heat to kinetic energy

Question : 2

In winter you touch a log of wood and a rod of iron, you will feed rod of iron is colder because

a) In comparison to wood, iron is good conductor of heat

b) In comparison to wood, iron is bad conductor of heat

c) The heat of rod of iron is less than the heat of log of wood

d) The rod of iron is heavier than the log of wood

Question : 3

If the lens power of glass is +2 dioptre, its focal length will be

a) 50 cm

b) 100 cm

c) 200 cm

d) 2 cm

Question : 4

Which of the following is used to take 3-dimensional pictures?

a) Radiography

b) Holography

c) Photography

d) None of these

Question : 5

If Va, Vw and Vs respectively are the speed of sound in air, water and steel, then

a) Vs < Vw < Va

b) Vw < Vs < Va

c) Va < Vw < Vs

d) Vs < Va < Vw

Question : 6

What is absolute zero temperature?

a) Theoretically the lowest possible temperature

b) The temperature at which the vapour of any liquid substance is condensed

c) The starting point of any temperature scale

d) The temperature at which all material are in vapour form