Refrigerator works on the phenomenon of ________ of heat transfer....? Mcqs

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Refrigerator works on the phenomenon of ________ of heat transfer....?

(A) Conduction
(B) Convection

(C) Radiation
(D) All of these

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Another name of vitamin C is__________...?

(A) Ascorbic Acid
(B) Acitic Acid

(C) Citric Acid
(D) Lysozyme

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Which cell component is a jelly-like substance that contains many chemicals and facilitates chemical reactions...?

(A) Nucleus
(B) Cell Wall

(C) Cytoplasm
(D) Cell Membrane

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Brass gets discoloured in air because of the presence of which of the following gases in air ________ ...?

(A) Carbon dioxide
(B) Oxygen

(C) Nitrogen
(D) Hydrogen sulphide

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The following are the methods to purify water except...?

(A) Filtration
(B) Distillation

(C) Crystallization
(D) Chlorination

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Electric motor was invented by __________ ...?

(A) Michael Faraday
(B) Oliver Evans

(C) Thomas Edison
(D) Horace Day

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Saccharine is made up of __________...?

(A) Toluene
(B) Phenol

(C) Propane
(D) None of these

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Pressure increases when ____...?

(A) Volume is increased
(B) Temperature is increased

(C) Area of contact is decreased
(D) Area of contact is increased

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An adult have permanent teeth...?

(A) 30
(B) 40

(C) 50
(D) 32

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Insects responsible for transmitting diseases are called___________...?

(A) Drones
(B) Vectors

(C) Hybirds
(D) None of these

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