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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Which of the part of tongue bears cells for sour taste...?

(A) Front
(B) Back

(C) Sides
(D) Middle

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The solar wind creates a “bubble” around the solar system called...?

(A) Feliosphere
(B) Seliosphere

(C) Heliosphere
(D) Peliosphere

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Glass is made of the mixture of______________...?

(A) Quartz and Mica
(B) Sand and Salt

(C) Sand and Silicates
(D) None of these

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The properties used for heat...?

(A) Hot, Energy, Cold
(B) Color, Smell, Sound

(C) , Heavy, Light, Hard
(D) Circle, Square, Point

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Hepatitis A is transmitted to various individuals by ...?

(A) Sneezing
(B) Faeces

(C) Spit
(D) Water

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Persistance of vision is the principle behind...?

(A) Camera
(B) Spectroscope

(C) Cinema
(D) Periscope

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The uniform or constant fact of nature, virtually an irrefutable theory is _____...?

(A) Scientific theory
(B) Scientific hypothesis

(C) Scientific reasoning
(D) Scientific law

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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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What regulates the flow of water through the xylem...?

(A) Passive transport by the endodermis
(B) The number of companion cells in the phloem

(C) The evaporation of water from the leaves
(D) Active transport by sieve-tube membrane

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