To measure the speed of an approaching car a police officer shines...? Mcqs

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To measure the speed of an approaching car a police officer shines...?

(A) light waves on it
(B) microwaves on it

(C) radio waves on it
(D) ultra high frequency waves on it

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Substances that react with both acids and bases are called...?

(A) Conjugate acids
(B) Conjugate bases

(C) Amphoteric substances
(D) Buffers

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Which gas is responsible for fermentation...?

(A) Carbon Dioxide
(B) Nitrogen

(C) Oxygen
(D) None

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What fear do people with haphephobia have...?

(A) fear of dogs
(B) fear of helicopters

(C) fear of touch
(D) fear of houses

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Most of the weather phenomena take place in which of the following layers of the atmosphere...?

(A) Mesosphere
(B) Ionosphere

(C) Stratosphere
(D) Troposphere

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What happens when two opposite poles of magnets are brought close to each other...?

(A) They repel
(B) They attract

(C) They make an electric current flow
(D) None

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Which of the following strongly supports the endosymbiont hypothesis of eukaryotic evolution...?

(A) Mitochondria and chloroplasts both have DNA
(B) Mitochondria is free living

(C) Both A and B
(D) None of the above

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_____ species are given scientific names....?

(A) All
(B) Some

(C) Few
(D) None

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Speed of sound in air per second is :...?

(A) 250 meters
(B) 331 meters

(C) 434 meters
(D) 343.2 meters

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The smallest particle of any substance having all properties of that molecules is called...?

(A) An atom
(B) A molecule

(C) A compound
(D) An element

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