The sun appears red at sunrise and sunset while it appears white at noon, because...? Mcqs

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The sun appears red at sunrise and sunset while it appears white at noon, because...?

(A) Of refraction
(B) It is cooler at sunrise and at sunset

(C) Of diffraction leading to red end of the spectrum reaching the earth.
(D) Of Scattering of light due to dust particles and air molecules.

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Which does not make use of the expansion and contraction...?

(A) A thermometer
(B) An electric iron

(C) A railway track
(D) An electric fan

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The side view mirrors of vehicles are of which type of mirrors...?

(A) Convex
(B) Concave

(C) Plane
(D) Inverted

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Which among the following is the correct sequence of the various layers of the Atmosphere from the Earth’s surface...?

(A) Ionosphere, Mesosphere, Stratosphere, Troposphere
(B) Mesosphere, Stratosphere, Ionosphere, Troposphere

(C) Troposphere, Stratosphere, Mesosphere, Ionosphere
(D) Troposphere, Ionosphere, Stratosphere, Mesosphere

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Which gas was discovered on the sun about 151 years ago during total solar eclipse...?

(A) Hydrogen
(B) Helium

(C) Nitrogen
(D) Flourine

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In that the half of the Earth which is facing away from sun, there is...?

(A) Day
(B) Winter

(C) Night
(D) Summer

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Reflex actions in head region are under the control of___________...?

(A) Brain
(B) Spinal cord

(C) both a & b
(D) non of the above

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The sun’s atmosphere is divided into following three parts:-...?

(A) the photosphere, the leutosphere , and the corona
(B) the photosphere, the chromosphere, and the scislophere

(C) the photosphere, the chromosphere, and the corona
(D) None of the above

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What is the chemical formula for Sulfuric acid...?

(A) C2H6O
(B) CaSO4

(C) C2H4O2
(D) H2SO4

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If the material recovers the original dimensions, when an external force is removed, this deformation is known as ______ deformation....?

(A) Inelastic
(B) Permanent

(C) Elastic
(D) Irreversible

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