What is the range, in hertz, of the normal human hearing...? Mcqs

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What is the range, in hertz, of the normal human hearing...?

(A) 10 Hz to 10 kHz
(B) 20 Hz to 20 kHz

(C) 2000Hz
(D) 40 Hz to 40 kHz

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Milky Way Galaxy in which type...?

(A) spiral
(B) Round

(C) Square
(D) Linear

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At night, Plants intake __________ and release __________...?

(A) Oxygen – Carbon dioxide
(B) Carbon dioxide – Oxygen

(C) Oxygen – Carbon monoxide
(D) None of theseCarbon monoxide – Oxygen

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The respiratory surface of human is ______...?

(A) Nostril
(B) Bronchiole

(C) Alveoli
(D) Trachea

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If the ratio of solute to solvent is high, the solution is said to be ______...?

(A) Aqueous Solution
(B) Unsaturated Solution

(C) Concentrated Solution
(D) Saturated Solution

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The process which is essential for continuing and survival of species is __________...?

(A) Digestion
(B) Respiration

(C) Reproduction
(D) Excretion

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Quantity of fresh air required for a man is 1000 cubic feet of air for every____________...?

(A) 5 minutes
(B) 10 minutes

(C) 15 minutes
(D) 20 minutes

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During which process does heat transfer occur because of density differences__________...?

(A) Convection
(B) Radiation

(C) Conduction
(D) None of these

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What is the percentage of salt water on earth surface...?

(A) 93%
(B) 95%

(C) 97%
(D) 76%

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The diagnosis of anthrax in cattle may be made by__________...?

(A) Spore staining
(B) Quellung reaction.

(C) Mcyfaydean reaction
(D) None of the above

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