Combustion can not take place without __________...? Mcqs

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Combustion can not take place without __________...?

(A) Hydrogen
(B) Air

(C) Oxygen
(D) Argon

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Plants prepare their food in the presence of...?

(A) Hydrogen
(B) Sunlight

(C) Nitrogen
(D) Both A and C

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Living organisms which derive their food from dead and decaying organic materials called...?

(A) Saprotrophs
(B) Parasites

(C) Predators
(D) Producers

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According to World Health Organization (WHO), the industrial limit of sound in the industries must be...?

(A) 80 dB
(B) 75 dB

(C) 85 dB
(D) 100 dB

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The chemical formula for methane gas is...?

(A) CH8
(B) CH6

(C) CH4
(D) CH2

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More than 50% of the Earth’s crust consists of ______ plains....?

(A) Abyssal
(B) Indus

(C) Low land
(D) None of these

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Who is the founder of solar system...?

(A) Copernicus
(B) Newton

(C) Galileo
(D) Kepler

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Adult human brain is about_________% of the total body weight....?

(A) 2%
(B) 3%

(C) 7%
(D) 8%

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Nail polish remover contains___________...?

(A) Acetone
(B) Benzene

(C) Acetic acid
(D) Petroleum ether

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Which product is obtained in the manufacture of soap from oils:...?

(A) Sodium chloride
(B) Sodium hydroxide

(C) Fats
(D) Glycerine

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