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Learn AIR FORCE MCQs with answers [Page 2 of Department 74]

R

Ram Sharma • 188.81K Points
Coach 

12) The bats can fly in the dark as

(A) they have weak legs & are likely to be attacked by predators
(B) they generate ultrasonic sound waves
(C) they can see the objects in darkness
(D) they generate flashes of light
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Correct Answer - Option (B)

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R

Ram Sharma • 188.81K Points
Coach 

13) Milk tastes sour when it is left in open for some time. This happens due to the formation of

(A) Citric acid
(B) Carbonic acid
(C) Lactic acid
(D) Acetic acid
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Correct Answer - Option (C)

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R

Ram Sharma • 188.81K Points
Coach 

14) Pasteurisation of milk means-

(A) heating of milk to above 72°C
(B) heating of milk to above 62°C
(C) cooling of milk to about 10°C
(D) cooling of milk to about 62°C
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Correct Answer - Option (B)

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R

Ram Sharma • 188.81K Points
Coach 

17) A substance which readily forms colloidal solution in contact with water is called

(A) Extrinsic colloid
(B) Hydrophilic colloid
(C) Hydrophobic colloid
(D) Related colloid
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Correct Answer - Option (B)

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R

Ram Sharma • 188.81K Points
Coach 

18) Which among the given characteristics is not typical of ionically bonded crystals?

(A) Shatters when crystal is distorted
(B) Conducts when melted
(C) Cleave into definite cleavage planes
(D) Has no sharp melting point
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Correct Answer - Option (D)

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R

Ram Sharma • 188.81K Points
Coach 

19) Milk is a colloidal system in which

(A) Fat is dispersed in water
(B) Fat is dissolved
(C) Water is dispersed in fat
(D) Fat & water are dispersed in each other
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Correct Answer - Option (A)

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R

Ram Sharma • 188.81K Points
Coach 

20) Helium is added to the oxygen supply of deep sea divers as it is

(A) Lighter than nitrogen
(B) less poisonous than nitrogen
(C) less soluble in blood than nitrogen at high pressure
(D) Readily miscible with oxygen
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Correct Answer - Option (C)

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You are learning MCQ Questions of AIR FORCE Department : 74 | Page : 2

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