The repetition of property after a certain interval called ___________...? Mcqs

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The repetition of property after a certain interval called ___________...?

(A) Electron efinity
(B) Atomic radius

(C) periodicity of property
(D) none of these

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Short-sightedness can be corrected by using ___________...?

(A) Convex lens
(B) Concave lens

(C) Convex-concave lens
(D) Concave-convex lens

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Which of the following has the largest wavelength...?

(A) visible light
(B) x-rays

(C) infrared light
(D) ultraviolet radiation

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The maximum number of electrons M orbit possesses...?

(A) 4
(B) 8

(C) 12
(D) 18

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Metals are good conductors of electricity because they have free _____...?

(A) Electrons
(B) Protons

(C) Neutrons
(D) Photons

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Radiations are harmful as it:___________...?

(A) Causes skin cancer
(B) Causes anemia

(C) Alters body tissue
(D) is unstable

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Rivet is used to fasten _____...?

(A) Soft material with soft material
(B) Hard material with hard material

(C) Soft material with hard material
(D) Hard material with soft material

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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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The matter of our sun is in ________ state...?

(A) Liquid
(B) Gas

(C) Solid
(D) Plasma

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Which is not a type of environment...?

(A) Garden
(B) Pond

(C) Storeroom
(D) None

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