The blue colour of the clear sky is due to...? Mcqs

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The blue colour of the clear sky is due to...?

(A) Refraction of light
(B) Reflection of light

(C) Diffraction of light
(D) scattering of light

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The ozone layer is at height of _________kilometers from the surface of the Earth....?

(A) 45-40 kilometers
(B) 35-40 kilometers

(C) 15-40 kilometers
(D) reflects back radio waves

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The velocity of sound in air at sea level is...?

(A) 881 meters per second
(B) 761 meters per second

(C) 661 meters per second
(D) 561 meters per second

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Dynamite was discovered by...?

(A) Daimler
(B) Mosley

(C) Alfred Nobel
(D) Freud

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Phases of the moon occur because...?

(A) only that part of the moon which reflects light
(B) Our distance from the moon keeps changing

(C) The thickness of the moon's atmosphere
(D) The shadow of the Earth covers only a part of moon

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______ projections can be drawn taking the help of a source of light by projecting the image of a network of parallels...?

(A) Perspective
(B) Conformal

(C) Cylindrical
(D) Conic

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Which is the largest volcano of the world...?

(A) Mauna Loa
(B) Mauna Kea

(C) Mount Etna
(D) None of these

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The time taken by light to reach the earth is...?

(A) 4 minutes 15 seconds
(B) 8 minutes 15 seconds

(C) 10 minutes 15 seconds
(D) 7 minutes 15 seconds

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Rainfall is measured using a...?

(A) Salinometer
(B) Rainoscope

(C) Rain gauge
(D) Rainometer

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Water _______ at 32° Fahrenheit and boils at 212° Fahrenheit...?

(A) Freeze
(B) Frozen

(C) Freezes
(D) None of these

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