Which of the following is responsible for largest amount of oxygen on earth...? Mcqs

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Which of the following is responsible for largest amount of oxygen on earth...?

(A) Peat bogs
(B) Algae

(C) Trees
(D) None of these

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Which method can be used to get drinking water from sea water...?

(A) Filtration
(B) Sublimation

(C) Crystallization
(D) Distillation

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Permanent hardness of water may be removed by the addition of___________...?

(A) Sodium Carbonate
(B) Alum

(C) Potassium Permanganate
(D) Lime

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What is RDX ...?

(A) An instrument
(B) A gene

(C) An explosive
(D) Cyanohydrin

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The products of the reaction between carbon dioxide and water are ______...?

(A) Glucose (C6H12O6) and Nitrogen (N2)
(B) Glucose (C6H12O6) and Oxygen (O2)

(C) Starch (C6H10O5) and Water (H2O)
(D) Cellulose (C6H10O5) and Carbon Monoxide (CO)

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When a single month has two full moons, the second moon is called________...?

(A) Super moon
(B) Blue moon

(C) Super blue moon
(D) Red moon

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The eggs of the following fish is sinking...?

(A) Tilapia
(B) Gulfam

(C) Rohu
(D) Trout

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What animal has longest gestation period of about 640 to 660 days or 95 weeks of any land animal ...?

(A) Blue Whale
(B) Elephant

(C) Opossum
(D) None of these

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When an object is placed very close to a concave mirror its image will be...?

(A) Virtual
(B) Upright

(C) Larger in size than the object
(D) All of these

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Which of the following metal occurs in free state ______________...?

(A) Lead
(B) Iron

(C) Mercury
(D) Copper

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