Which are the only two elements on the periodic table that are liquid at room temperature...? Mcqs

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Which are the only two elements on the periodic table that are liquid at room temperature...?

(A) Mercury and Bromine
(B) Carbon and helium

(C) Nitrogen and Hydrogen
(D) Oxygen and Neon

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What are the three subatomic particles of an atom...?

(A) Protons,Neutrons & Electrons
(B) Protons,Nucleus & Electrons

(C) Protons,Nucleus & Elements.
(D) Elements,Nucleus & Protons

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To view dim stars, we use ______...?

(A) Compound microscope
(B) Endoscope

(C) Telescope
(D) Simple microscope

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When a bullet penetrates into a target, the kinetic energy of a bullet is converted into ...?

(A) Potential energy
(B) Heat energy

(C) Both B&D
(D) Mechanical energy

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The human eye forms the image of an object at its________...?

(A) Cornea
(B) Pupil

(C) Iris
(D) Retina

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Members of different species living in specific habitat are called...?

(A) Community
(B) Population

(C) Ecosystem
(D) Biomes

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pH value of water is _________...?

(A) 5
(B) 5-6

(C) 8.7-10.5
(D) 6.5-8.5

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Uncertainty Principle was given by...?

(A) Werner Heisenberg
(B) Farady

(C) John locke
(D) None of these

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Radioactive isotope of Uranium used in Nuclear Bomb is ...?

(A) 92 U 235
(B) 92 U 234

(C) 92 U 233
(D) 92 U 238

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A ______ is a semiconductor component that can either be used as switch or an amplifier....?

(A) Three pine shoe
(B) Transistor

(C) Reflector
(D) Dipole

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