First controlled fission of an atom was carried out in ________ on 1938....? Mcqs

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First controlled fission of an atom was carried out in ________ on 1938....?

(A) U.S
(B) Germany

(C) Russia
(D) U.K

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One Astronomical unit is equal to how much Km in whole numbers...?

(A) 160 million km
(B) 140 million km

(C) 150 million km
(D) 130 million km

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Name the branch of science which deals with the study of sound and sound waves...?

(A) Aeronautics
(B) Acoustics

(C) Aerostatics
(D) Aetiology

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Relaxation of heart muscles and allowing the chambers to fill with blood called...?

(A) Diastole
(B) Systole

(C) Cardiac arrest
(D) Heart failure

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Magnifying power of a simple microscope can be increased by ...?

(A) increasing focal length of the lens
(B) Decreasing focal length of the lens

(C) Lens of large aperture
(D) lens of short aperture

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What process takes place between particles of ink and particles of water when a drop of ink is added to water...?

(A) Osmosis
(B) Diffusion

(C) Sedimentation
(D) Decomposition

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Ozone layer is part of ______...?

(A) Mesosphere
(B) Stratosphere

(C) Thermosphere
(D) Troposphere

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Battery was invented by__________...?

(A) Nicolas Léonard Sadi Carnot
(B) Alessandro Volta

(C) Michael Faraday
(D) Friedrich Bessel

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Balloons are filled with _________ ...?

(A) Nitrogen
(B) Helium

(C) Oxygen
(D) Argon

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Biodiversity is effected with _______...?

(A) Pollution
(B) Deforestation

(C) Over hunting
(D) All of these

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