Refraction of sound can occur in:...? Mcqs

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Refraction of sound can occur in:...?

(A) Water
(B) Air

(C) Both A & B
(D) None of these

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A horizontal line that passes through the lens is called ____...?

(A) Focal Point
(B) Optical Centre

(C) Centre of Curvature
(D) Principal Axis

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Our galaxy (Milky Way Galaxy) is _____ in shape....?

(A) Irregular
(B) Spiral

(C) Elliptical
(D) Circular

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In Eye donation, which part of the eye used...?

(A) Retina
(B) Iris

(C) Cornea
(D) Optic nerve

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Which of the following vitamin is known as Niacin...?

(A) vitamin B-6
(B) vitamin B-12

(C) vitamin B-1
(D) vitamin B-3

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Some substances are good conductor of electricity in both the solid and liquid states. These substances are generally______________...?

(A) ionic substances
(B) metallic substances

(C) molecular solids
(D) covalent network solids

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How many layers does the earth have...?

(A) 1
(B) 2

(C) 3
(D) 4

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The defect in which the image is formed beyond the retina is called...?

(A) Long-sightedness
(B) Blind spotting

(C) Short-sightedness
(D) Image defect

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Which planet is losing its atmosphere at faster than the earth...?

(A) Mecury
(B) Venus

(C) Mars
(D) Jupiter

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The correct age of solar system is approximately __________...?

(A) 4.3 Billion years
(B) 4.4 Billion years

(C) 4.5 Billion years
(D) None of these

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