Which of the following physical phenomena can not be described only by the wave theory of electromagnetic radiation...? Mcqs

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Which of the following physical phenomena can not be described only by the wave theory of electromagnetic radiation...?

(A) Diffraction
(B) interference

(C) Photoelectric emission
(D) Polarization

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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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If a body of mass 1 kg is moving with velocity of 1 m/sec. then K.E of the body will be...?

(A) 3 Joules
(B) 4 Joules

(C) 1/2 Joule
(D) 1 Joule

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During winter in cold countries, the __________ is mixed to melt the ice on the icy roads....?

(A) Salt
(B) Chlorine

(C) Carbon dioxide
(D) Water

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Symptoms of vitamin b7 deficiency are known to ______________....?

(A) Pellagra
(B) Hair Loss

(C) Muscle weakness
(D) Xerophthalmia

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A material through which heat energy can flow easily is called...?

(A) Thermal Conductor
(B) Thermal Insulator

(C) Both A and B
(D) None

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In which of the following processes is energy released ...?

(A) Respiration
(B) Photosynthesis

(C) Ingestion
(D) Absorption

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A colour blind person cannot distinguish between _________...?

(A) White & Yellow
(B) Red & Green

(C) Red & Black
(D) Green & Black

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Leach has ________ number of brains....?

(A) Zero
(B) 32

(C) 36
(D) None of these

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Which of the following is both endocrine and exocrine gland...?

(A) thyroid
(B) pancreas

(C) parathyroid
(D) all of these

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