1) A raw egg and a boiled egg of the same appearance, same size and same mass can be distinguished, without breaking, by using
*a)inertia of motion
b) inertia of rest
c) conservation of linear momentum
d) conservation of angular momentum
2) Nib of a pen is split keeping in view the phenomenon of
a)osmosis
b) diffusion
*c) capillarity
d) cohesion
3) Speeds of bodies exceeding the speed of sound are called
*a)supersonic
b) ultrasonic
c) infrasonic
d) superfast
4) Refractive index is highest for
a)glass
b) water
c) rock-salt
*d) diamond
5) The splitting of a beam of white light into its different colours is known as
a)refraction
b) reflection
*c) dispersion
d) none of these
6) In winter, the temperature of the inside wall of a house as compared to the temperature of the air in the room is
*a)lower
b) higher
c) the same
d) depends on the atmospheric pressure
7) At what temperature are the readings of a centigrade and Fahrenheit thermometers the same?
a)-400
b) 400
*c) 1000
d) 2120
8) Which of the following electronic devices is used for digital displays electronic calculators?
a)photo diodes
b) zener diodes
c) LEDs
*d) none of these
9) Which one of the following substances is non-magnetic?
a)glass
b) wood
c) silver
*d) all these
10) Sound travels fastest through
a)vacuum
*b) steel
c) water
d) air
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