The principal constituent of the atmosphere of the Earth is...? Mcqs

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The principal constituent of the atmosphere of the Earth is...?

(A) Oxygen
(B) Carbon

(C) Hydrogen
(D) Nitrogen

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Two bulbs are connected in a parallel circuit. One bulb blows (blast), what will happen to the other bulb...?

(A) Also blow (blast)
(B) Go out (be turned off)

(C) Glows brighter
(D) Remains same

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The part of an eye acting as a black point of camera is ______...?

(A) Sclera
(B) Retina

(C) Optic disc
(D) Choroid

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Which Planet is known as Watery Planet...?

(A) Earth
(B) Mars

(C) Jupiter
(D) Mercury

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Friction can be reduced by changing from _________...?

(A) Rolling to sliding
(B) Sliding to rolling

(C) Dynamic to static
(D) Potential energy to kinetic energy

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Ions are charged particles of atoms and form negative and positive charges due to ____...?

(A) Proton
(B) Electron

(C) Neutron
(D) None

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Animals that eat only animals are called...?

(A) Carnivores
(B) Herbivores

(C) Omnivores
(D) None

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The Boolean expression of an AND gate is ______...?

(A) A . B
(B) A + B

(C) A x B
(D) None of these

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A radioactive element emits a particle from the nucleus of one of its atoms. The particle comprises two protons and two neutrons. The name of this process is called...?

(A) α-emission
(B) β-emission

(C) γ-emission
(D) Nuclear fission

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Pupa of butterfly is also called...?

(A) Chrysalis
(B) Eggs

(C) Larva
(D) Adult

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