set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

Direct viewing of Sun during total solar eclipse causes irreversible damage to eyes. The retinal burn is caused by which one of the following components of the Sun rays?

a) Ultra-violet light

b) Rainbow light

c) Heat

d) Infra-red light

Question : 2

A Centigrade thermometer and Fahrenheit thermometer are dipped in boiling water. The temperature of water is lowered till the Fahrenheit thermometer registers half of its upper fixed point. What is the corresponding fall temperature registered by the Centrigrade thermometer?

a) Approximately 41°C

b) Half of its range of temperature between the upper and the lower fixed points

c) Approximately 59°C

d) 18°C

Question : 3

Find out the odd colour from the following options.

a) Red

b) Brown

c) Green

d) Yellow

Question : 4

Which of the following parts of eye protects the eye and gives it shape?

a) Yellow spot

b) Choroid

c) Sclera

d) Ciliary muscles

Question : 5

In cold countries, alcohol is preferred to mercury as a thermometric liquid because

a) Alcohol is a better conductor of heat

b) Alcohol is cheaper than mercury

c) Alcohol has a lower freezing point

d) The world production of alcohol is greater than that of mercury

Question : 6

An air bubble in water will act like a

a) Concave mirror

b) Convex lens

c) Convex mirror

d) Concave lens