___________ begins at 690 to 1,000 km from the surface, and extends to roughly 10,000 km....? Mcqs

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___________ begins at 690 to 1,000 km from the surface, and extends to roughly 10,000 km....?

(A) Troposphere
(B) Mesosphere

(C) Exosphere
(D) Stratosphere

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The difference in the duration of day and night increases as one moves from:_________...?

(A) West to East
(B) East and west of the prime meridian

(C) Equator to poles
(D) None of these

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Chromosomes with one arm very small and other very long called ____...?

(A) Metacentric
(B) Acrocentric

(C) Telocentric
(D) Submetacentric

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Brass gets discoloured in air because of the presence of which of the following gases in air ________ ...?

(A) Carbon dioxide
(B) Oxygen

(C) Nitrogen
(D) Hydrogen sulphide

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Which of the following is not a mosquito born disease...?

(A) Dengue fever
(B) Malaria

(C) Sleeping sickness
(D) Filariasis

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The source of the Sun’s energy is the process of ____________...?

(A) Photoelectric emission
(B) Nuclear fission

(C) Nuclear fusion
(D) Thermionic emission

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Which is the best indication that a chemical reaction has taken place...?

(A) Blue powder turns water blue
(B) Metal budding when placed in an unknown liquid

(C) A white substance dissolving in water
(D) None

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A pulsar is actually a___________...?

(A) Black hole
(B) White dwarf

(C) Red giant
(D) Neutron star

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Hydrogen bomb is based on the principle of ________ ...?

(A) Nuclear fusion
(B) Artificial radioactivity

(C) Natural radioactivity
(D) Nuclear fission

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Lock Jaw i.e. difficulty in opening the mouth, is a symptom of___________...?

(A) Chlorea
(B) Plague

(C) Diphtheira
(D) Tetanus

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