Which of the following atmospheric layers help in radio communication...? Mcqs

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Which of the following atmospheric layers help in radio communication...?

(A) Exosphere
(B) Ionosphere

(C) Troposphere
(D) Stratosphere

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An ordinary mobile phone communicate by using___________...?

(A) Sound waves
(B) Infrared waves

(C) UV waves
(D) Radio waves

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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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Change of state form liquid to solid is _________...?

(A) Boiling
(B) Freezing

(C) Evaporation
(D) None of these

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Which of the following does not affect the boiling point...?

(A) Intermolecular forces
(B) External pressure

(C) Initial temperature of liquid
(D) Nature of liquid

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The muscle which is responsible to straighten the limb is _______...?

(A) Ligament
(B) Skeleton muscle

(C) Flexor
(D) Extensor

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The audible range of normal whale ear is _____...?

(A) 16 Hz to 20kHz
(B) 10 Hz to 31kHz

(C) 67 Hz to 45kHz
(D) 20 Hz to 20kHz

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The breakdown of food molecules to release energy is called...?

(A) Photosynthesis
(B) Fermentation

(C) Respiration
(D) Mitosis

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You should not do one of the following while handling a clinical thermometer...?

(A) Wash it before use
(B) Run

(C) Stay at one place
(D) Place it in cover after use

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Which blood cells are called ‘Soldiers’ of the body ...?

(A) WBC
(B) Platelets

(C) RBC
(D) All of the above

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