Rainbow is seen after rain because of hanging molecules of water which act as __________...? Mcqs

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Rainbow is seen after rain because of hanging molecules of water which act as __________...?

(A) Lens
(B) Prism

(C) Mirror
(D) Slabs

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The lowest region of the earth’s atmosphere comes between the earth and stratosphere. what is this region’s name...?

(A) Ionosphere
(B) Troposphere

(C) Stratosphere
(D) Mesosphere

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What is the direction of the magnetic field lines inside a bar magnet...?

(A) From north pole to south pole
(B) South pole to north pole

(C) From side to side
(D) There are no magnetic field lines

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Mass extinction of dinosaurs occurred in which period...?

(A) Triassic
(B) Jurassic

(C) Cretaceous
(D) Permian

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Choose the correct statement regarding lock and key model...?

(A) Enzyme and substrate posses' specific complementary geometric shapes
(B) Active site of enzyme is flexible

(C) Active site continuously changes
(D) All above statements are correct

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Lactose is ______...?

(A) Grape sugar
(B) Honey sugar

(C) Milk sugar
(D) Cane sugar

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MMR vaccines are given to children to develop resistance against ____...?

(A) Malaria
(B) TB

(C) Measles
(D) Hepatitis

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Girl is riding a bicycle. She covers a distance of 150 meters is 5 seconds. The cycling speed of a girl is...?

(A) 20 m/s
(B) 30 m/s

(C) 40 m/s
(D) 50 m/s

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The freezing point of water is the same as its...?

(A) Melting point
(B) Boiling point

(C) Evaporation point
(D) None

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Which of the following type of Coal, has maximum carbon content...?

(A) Peat
(B) Lignite

(C) Anthracite
(D) Bituminious

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