Our atmosphere comprises of __________ Nitrogen...? Mcqs

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Our atmosphere comprises of __________ Nitrogen...?

(A) 38% Nitrogen
(B) 58% Nitrogen

(C) 78% Nitrogen
(D) None of these

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Permanent hardness of water is due to the presence of __________...?

(A) Sodium bicarbonate
(B) Calcium sulfate

(C) Calcium bicarbonate
(D) None of these

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Chromosomes are made up of _____...?

(A) Proteins and Nucleic Acid
(B) Carbohydrates and Lipids

(C) Proteins and Minerals
(D) Nucleic Acid and Carbohydrates

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When water is filled in a bottle and is allowed to freeze, the bottle breaks because...?

(A) Water expands on freezing
(B) Bottle contracts at freezing point

(C) temperature outside the bottle is less than that inside the bottle.
(D) None of the above

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What is the body’s natural or acquired ability to resist certain diseases...?

(A) Immunity
(B) Endocrine

(C) Exocrine
(D) All of above

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Who invented steamboat...?

(A) James Watt
(B) Robert Fluton

(C) Frank Whittle
(D) George Stephenson

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How many bones in our body...?

(A) 102
(B) 306

(C) 206
(D) 204

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Alzheimer’s disease is a _________ disorder....?

(A) Genetic
(B) Brain

(C) Eye
(D) Body Weight Loss

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One of the main function of the earth’s ozone layer is to ...?

(A) Prevent global warming
(B) Filter out ultraviolet rays

(C) Absorb pollution
(D) All of the above

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The Sun is at an average distance of about________ million kilometers away from Earth...?

(A) 100 million
(B) 150 million

(C) 200 million
(D) 250 million

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