Which gas is used for artificial ripening of green fruit ...? Mcqs

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Which gas is used for artificial ripening of green fruit ...?

(A) Carbon dioxide
(B) Acetylene

(C) Ethane
(D) Ethylene

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Severe deficiency of Vitamin D results in __________....?

(A) scurvy
(B) rickets

(C) night blindness
(D) None of these

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Which stone floats on water...?

(A) Pumice stone
(B) Lime stone

(C) Basalt stone
(D) Quartzite stone

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In a railway track, two rails are joined end to end with a gap tin between them because...?

(A) Steel can be saved
(B) Accidents due to contraction in winter can be avoided

(C) Air gaps are necessary for bearing the weight of running train
(D) Accidents due to expansion in summer can be avoided

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The study of heavenly bodies is known as_________...?

(A) Astrology
(B) Astronautics

(C) Astronomy
(D) Astrophysics

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Total internal reflection of light is possible when light enters from ____...?

(A) Air to water
(B) Glass to glass

(C) Water to air
(D) Air to glass

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The optical phenomenon in which the splitting of white light into seven distinct colors occur is called...?

(A) Refraction
(B) Dispersion

(C) Reflection
(D) Diffraction

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The sky drivers use parachutes to easily descend towards the earth because of it:...?

(A) Increases air resistance
(B) Decreases air resistance

(C) Decreases air friction
(D) Speeds up

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In constructive reaction _____ molecules are formed....?

(A) Small
(B) Medium

(C) Equal
(D) Large

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The type of lens in our eye is ______...?

(A) Convex
(B) Concave

(C) Both a & b
(D) None of these

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