Which of the following is the lightest substance...? Mcqs

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Which of the following is the lightest substance...?

(A) Uranium
(B) Hydrogen

(C) Oxygen
(D) Nitrogen

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Soap is prepared by boiling caustic soda with ___________...?

(A) Alcohol
(B) Kerosene oil

(C) Glycerine
(D) Fats

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Who invented bifocal eyeglasses...?

(A) Ibn-e-Haitem
(B) Benjamin Franklin

(C) Archemedes
(D) None

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Coleoptile is a structure found in _____...?

(A) Maize Seed
(B) Bean Seed

(C) Both A and B
(D) None

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The gas, commonly known as “laughing gas”, is...?

(A) Carbon Dioxide
(B) Sulfur Dioxide

(C) Nitrous Oxide
(D) Sodium Oxide

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The percentage of blood cells in the Blood of human body is _________...?

(A) 40%
(B) 45%

(C) 50%
(D) 60%

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Steradian is the unit of_______________...?

(A) Solid angle
(B) Liquid angle

(C) Gas angle
(D) Plain angle

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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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Solubility is usually expressed in grams of the solute dissolved in ________ gram of a solvent....?

(A) 10 grams
(B) 100 grams

(C) 500 grams
(D) 1000 grams

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In Daniel cell ____ is used as cathode....?

(A) Zn
(B) Cu

(C) Sn
(D) Pb

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