The cooling fins at the back of refrigerator are made of black and rough surface because ____...? Mcqs

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The cooling fins at the back of refrigerator are made of black and rough surface because ____...?

(A) They are good conductors of heat
(B) They are good radiators of heat

(C) They are good insulators of heat
(D) They are not important for heat transfer

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In which type of seed the process epigeal germination takes place...?

(A) Dicot Seed
(B) Monocot Seed

(C) Tricot Seed
(D) None

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In onion pink color is due_____ ...?

(A) anthocyanin
(B) Carotene

(C) Xanthophylls
(D) None of these

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Which one of the following is also known as shooting stars...?

(A) Asteroids
(B) Comets

(C) Black Holes
(D) Meteoroids

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The heaviest naturally-occurring element is_________...?

(A) Radium
(B) Platinum

(C) Uranium
(D) Cadmium

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Which one of the following is not a way to reduce friction...?

(A) Smooth and polishing surfaces
(B) Less contact area

(C) Oil and lubricants
(D) Ball bearing and rollers

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The part of an eye acting as a black point of camera is ______...?

(A) Sclera
(B) Retina

(C) Optic disc
(D) Choroid

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Substance used in match sticks ...?

(A) Sulphur
(B) Zinc

(C) Acid
(D) Phosphorus

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The instrument used to measure temperature is called the...?

(A) Barometer
(B) Hygrometer

(C) Thermometer
(D) Spectrometer

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How many number of milk teeth are in the human body...?

(A) 16
(B) 12

(C) 22
(D) 20

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