(A) Water is a good conductor of heat
(B) Water has a very high specific heat capacity
(C) Water boils at a comparatively high temperature
(D) Evaporation of water produces a lot of cooling

(A) Remain unaffected
(B) Fall away from the train
(C) Fall towards the train
(D) Fall away from or towards the train depending upon the speed

(A) Ultraviolet Waves
(B) Ultrasonic Waves
(C) Electromagnetic Waves
(D) Special Retina

(A) Carbon dioxide
(B) Carbon monoxide
(C) Carbon tetrachloride
(D) None of the above

(A) the strength of T.V. waves is very limited
(B) a picture cannot be transmitted clearly after a specific distance
(C) the shape of the earth is spherical
(D) the air is not a good conductor of light and sound/waves

(A) 60%
(B) 65%
(C) 72%
(D) 80%

(A) Mesosphere
(B) Troposphere
(C) Stratosphere
(D) ionosphere

(A) One-tenth
(B) One fifth
(C) One fourth
(D) One third

(A) The mass of the astronaut is reduced to zero
(B) Gravity inside the spacecraft ceases to act
(C) The astronaut is outside the influence of the earth’s gravitational force
(D) The astronaut and the spacecraft are both in a free-failing state

(A) Of refraction
(B) It is cooler at sunrise and at sunset
(C) Of diffraction leading to the red end of the spectrum reaching the earth.
(D) Of Scattering of light due to dust particles and air molecules.