Disolved oxygen (DO) in water should be...? Mcqs

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Disolved oxygen (DO) in water should be...?

(A) 400 to 800 ppm
(B) 4000 to 8000 ppm

(C) 0.4 to 0.5 ppm
(D) 4 to 5 ppm

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Myopia is a defect of Human eye. it can be corrected by using a lens called...?

(A) Convex lens
(B) Concave lens

(C) Cylindrical lens
(D) Plano convex lens

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Which lists the substances from least to most acidic...?

(A) Blood, milk, ammonia, orange juice
(B) Blood, ammonia, milk, orange juice

(C) Milk, blood, orange juice, ammonia
(D) Ammonia, blood, milk, orange juice

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Plants make their own food using...?

(A) CO2 & water
(B) Sunlight

(C) Chlorophyll
(D) Photosynthesis

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Which one of the following is strong acid...?

(A) HF
(B) HCl

(C) HBr
(D) HI

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Deficiency of vitamin C will cause:__________...?

(A) Beri-Beri
(B) Architis

(C) Scurvy
(D) Night-blindness

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The process by which living organism increase their numbers is known as...?

(A) Reproduction
(B) Respiration

(C) Digestion
(D) Photosynthesis

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The system is stable in equilibrium when ______...?

(A) Qc = Kc
(B) Qc > Kc

(C) Qc < K
(D) None of these

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In an oil lamp, the oil rises up in the wick due to...?

(A) Capillary action
(B) Atmospheric pressure

(C) Viscosity of oil
(D) Change in temperature

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Name the Scientist who stated that matter can be converted into energy...?

(A) Boyle
(B) Einstein

(C) Avogadro
(D) Lavoisier

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