The Earth takes ______ to revolve around the sun....? Mcqs

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The Earth takes ______ to revolve around the sun....?

(A) 365 days and 4 hours
(B) 365 days and 6 hours

(C) 365 days and 8 hours
(D) 365 days and 10 hours

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How long does it take for the moon to orbit the earth once...?

(A) 26.3 days
(B) 27.3 days

(C) 28.3 days
(D) 30.3 days

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During the daytime for the photosynthesis, plants require ______...?

(A) O2
(B) N2

(C) CO2
(D) H2

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The main culprit of greenhouse effect is Carbon dioxide. But which is the second element contributing most to greenhouse effect...?

(A) Nitrogen Dioxide (NO2)
(B) Chlorofluorocarbons (CFCs)

(C) Methane (CH4)
(D) High-fructose corn syrup (HFCs)

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In whole Periodic Table which element Is Most Reducing Agent ...?

(A) Chlorine
(B) lithium

(C) Helium
(D) Neon

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What is the molecular formula for Ammonia...?

(A) NH
(B) NH2

(C) NH3
(D) NH4

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Which of the following physical phenomena can not be described only by the wave theory of electromagnetic radiation...?

(A) Diffraction
(B) interference

(C) Photoelectric emission
(D) Polarization

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The kidney is enclosed in a membrane called...?

(A) Pericardium
(B) Peritoneum

(C) Pleural membrane
(D) Plumule

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Gravitational force is always ______...?

(A) Repulsive
(B) Attractive

(C) Both
(D) None of these

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Which of the following allows all light to pass through it...?

(A) Book
(B) Air

(C) Wood
(D) Newspaper

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