The weight of an average human male brain is about...? Mcqs

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The weight of an average human male brain is about...?

(A) 1 gr
(B) 1200 gr

(C) 1350 gr
(D) 1500 gr

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Atmospheric pressure decrease rapidly with altitude because the air becomes_______ ...?

(A) Colder
(B) Less denser

(C) Rich in Ozone
(D) Warmer

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Solution is a kind of...?

(A) Mixture
(B) Element

(C) Compound
(D) None

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The carbon dioxide content in the air that we exhale is about...?

(A) 4%
(B) 9%

(C) 15%
(D) 16%

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A group of similar cells combine together to form _____...?

(A) Organ
(B) System

(C) Cell
(D) Tissue

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The ozone layer is at height of________kilometers from the surface of the Earth...?

(A) 10 to 20
(B) 20 to 30

(C) 30 to 40
(D) 40 to 50

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Other name of red blood cells is ____________...?

(A) Erythrocytes
(B) Leukocytes

(C) Thrombocytes
(D) None of these

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Magnalium is an alloy of_____________...?

(A) Magnesium and Lead
(B) Aluminium and Zinc

(C) Aluminium and Magnesium
(D) Aluminium and Mercury

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Which of the following is not a chemical reaction ...?

(A) Burning of coal
(B) Conversion of water into steam

(C) Digestion of food
(D) Burning of paper

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A movable pulley is used as ______...?

(A) Speed multiplier
(B) Force multiplier

(C) Direction changer
(D) Load reducer

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