Diamond is a very expensive ornament. It is composed of a single element ___________...? Mcqs

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Diamond is a very expensive ornament. It is composed of a single element ___________...?

(A) Carbon
(B) Gold

(C) Silver
(D) Platinum

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How many layers of Atmosphere...?

(A) 2
(B) 3

(C) 4
(D) 5

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Opening and closing of stomata is also regulated by ___...?

(A) Epidermal cells
(B) Guard cells

(C) Root hair cells
(D) Mesophyll cells

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Most abundant color in Earth is_________...?

(A) Blue
(B) Green

(C) Brown
(D) Black

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Permanent hardness of water due to sulphate of metals can be destroyed by the use of ________ ...?

(A) Zeolites
(B) Sulphonides

(C) Lime
(D) Nitrates

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vitamin D is chemically know as_________ ...?

(A) Retinol
(B) Calciferol

(C) Tocopherol
(D) None of these.

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If the level of atmospheric pollution increases:...?

(A) The length of the day will increases
(B) The length of the day will decreases

(C) The length of the day will remain same
(D) None of these

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Malaria is a disease which effects the____________...?

(A) Heart
(B) Lungs

(C) Spleen
(D) Kidneys

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Vitamins were discovered by__________...?

(A) Moesley
(B) Chadwick

(C) Frank Whittle
(D) Casimir Funk

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Rapid back and forth movement of an object is known as...?

(A) Rotation
(B) Revolution

(C) Vibration
(D) Translation

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