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

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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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An example of an abiotic component __________...?

(A) Plants
(B) Soil

(C) Animals
(D) Bacteria

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Sensitive layer of the eye is...?

(A) Choriods
(B) Sclerotic

(C) Retina
(D) Cornea

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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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A tight-rope walker carries a long pole which he holds across his body. The purpose of this pole is to__________...?

(A) Prop him up if he falls
(B) Spread out his weight and reduce the pressure on the rope

(C) Add extra weight to keep the rope tightly stretched
(D) To keep the Center of gravity always above vertically above the rope

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What is unit of conductivity...?

(A) Ohm
(B) Watt

(C) mho
(D) None of these

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What happens when water solidifies as ice on cooling from 4°C to 0°C...?

(A) Its volume increases and density decreases
(B) Its volume increases and density increases

(C) Its volume decreases and density decreases
(D) Its volume decreases and density increases

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The Moon is illuminated because it ________ the light from the Sun....?

(A) Absorbs
(B) Reflects

(C) Deflects
(D) Refracts

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The process which is essential for continuing and survival of species is _____...?

(A) Digestion
(B) Respiration

(C) Reproduction
(D) Excretion

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The ability to attract shared pair of electron is called ______...?

(A) Electron Affinity
(B) Electronegativity

(C) Ionization Energy
(D) Shielding Effect

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