SI unit of time is_________...? Mcqs

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SI unit of time is_________...?

(A) second
(B) kilo gram

(C) meter
(D) volt

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The simplest kind of matter which cannot be further split up into simpler substances by chemical reactions is called...?

(A) Compound
(B) Atom

(C) Molecule
(D) Element

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Blood is cleaned by __________...?

(A) Lungs
(B) Liver

(C) Heart
(D) Kidneys

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__________ gas is released when coal is burnes in ln lack of Oxygen...?

(A) Carbon Dioxide
(B) Methane

(C) Ethene
(D) Carbon Monoxide

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Which substance expands the most; for the same rise in temperature...?

(A) Water
(B) Air

(C) Copper
(D) Class

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The speed of sound in air at sea level is approximately____________...?

(A) 300 meter per second
(B) 320 meter per second

(C) 340 meters per second
(D) 370 meter per second

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Which one of the following is not a way to reduce friction...?

(A) Smooth and polishing surfaces
(B) Less contact area

(C) Oil and lubricants
(D) Ball bearing and rollers

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Which planet is called “red planet”...?

(A) Mars
(B) Venus

(C) Jupiter
(D) Saturn

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Part of earth where life exists is called ______...?

(A) Lithosphere
(B) Atmosphere

(C) Biosphere
(D) Hydrosphere

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Sea food is an excellent source of protein because it's usually low in ______...?

(A) Fats
(B) Carbohydrates

(C) Proteins
(D) Minerals

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