A mixture of sand and naphthalene can be separated by ________ ...? Mcqs

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A mixture of sand and naphthalene can be separated by ________ ...?

(A) Chromatography
(B) Fractional distillation

(C) Sublimation
(D) None of these

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Fatal degenerative lung disease caused by particulate asbestos is referred to as _____________...?

(A) asbestosis
(B) asthma

(C) allergy
(D) sinusitis

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___________ is a star at the center of the solar system...?

(A) Earth
(B) Mercury

(C) Sun
(D) Venus

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Which element is used as moderator in nuclear reactor...?

(A) Light water
(B) Dense water

(C) Fresh water
(D) Heavy water

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Animal that eat the primary and secondary consumers are called...?

(A) Tertiary Consumer
(B) Primary Consumer

(C) Secondary Consumer
(D) None

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All electromagnetic waves travel through a vacuum at ______...?

(A) The different speed
(B) The same speed

(C) The increasing speed
(D) The decreasing speed

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Heavy mechanical complex use a large amount of water for_________...?

(A) Cooling
(B) Freezing

(C) Washing
(D) Mixing

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Which of the following is the hardest substance...?

(A) Copper
(B) Diamond

(C) Iron
(D) Silicon

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A pair of unlike parallel forces having different lines of force produce _______...?

(A) Equilibrium
(B) Torque

(C) A couple
(D) Unstable equilibrium

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For being able to see three-dimensional pictures we have to use_________...?

(A) A binocular
(B) A camera

(C) An epidiascope
(D) A stereoscope

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