Which gas is produced when trees and fossil fuels are burnt...? Mcqs

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Which gas is produced when trees and fossil fuels are burnt...?

(A) Carbon monoxide
(B) Carbon dioxide

(C) Nitrogen oxide
(D) Oxygen

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The day and night are formed due to 'Earth' rotation on its own axis from...?

(A) North to South
(B) South to North

(C) East to West
(D) West to East

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Transportation of water takes place through continuous tubes in roots, stem and leaves are called as...?

(A) Xylem
(B) Phloem

(C) Stomata
(D) Cambium

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A common skin condition that causes skin redness and irritation is known as_________...?

(A) Psoriasis
(B) Hypermetropia

(C) Leukoderma
(D) Diphtheria

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Light Emitting Diode (LED) is a ___ semiconductor device ....?

(A) 3 lead
(B) 4 lead

(C) 7 lead
(D) 2 lead

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Conversion of free energy into different forms by living organisms is called...?

(A) Biophysics
(B) Biomechanics

(C) Bioenergetics
(D) Biochemistry

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The outermost layer of the sun is called...?

(A) Fotofera
(B) Corona

(C) Core
(D) Cromosfera

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All are postulates of cell theory except...?

(A) New cell is derived from pre-existing cells
(B) Cell does not contain the hereditary material

(C) All living organisms are made up of one or more cells
(D) Cell is the fundamental unit of life

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The waves that have maximum penetrating power to treat tumors are ______...?

(A) Ultraviolet radiation
(B) Microwaves

(C) Gamma-rays
(D) Radio waves

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Border line which separates outer space from Earth’s atmosphere is known as___________...?

(A) Durand line
(B) Space line

(C) Venus line
(D) Karman line

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