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

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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 centre of gravity always vertically above the rope

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In which of the following, speed of the sound is maximum...?

(A) Gold
(B) Sea water

(C) Air
(D) Space

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The main source of energy in the stars is _____...?

(A) Chemical reaction
(B) Nuclear fission

(C) Nuclear fusion
(D) Mechanical energy

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Which of the following is nutritional deficiency disease...?

(A) Albinism
(B) Cirrhosis

(C) Rabies
(D) Pellagra

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Each day human body breathe in __________ liters of air....?

(A) 5,000 to 10,000
(B) 10,000 to 15,000

(C) 15,000 to 20,000
(D) 20,000 to 25,000

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Carbon dioxide was discovered by_______...?

(A) Niels Bohr
(B) Amedeo Avogadro

(C) Joseph Black
(D) None of Above

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The activity in relation to changes in environment is ______...?

(A) Stimulus
(B) Response

(C) Both a & b
(D) None of these

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Boiling of an egg is a change which is__________...?

(A) Physical
(B) Chemical

(C) Physiological
(D) Morphological

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Which of the following is the main difference between electromagnets and bar magnets...?

(A) Electromagnets are stronger than bar magnets
(B) Bar magnets are permanent, but electromagnets are temporary

(C) Electromagnets are used in motors, but bar magnets are used in generators
(D) Electromagnets need electricity but bar magnets do not need electricity

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The beautiful color patterns exhibited by a peacock in its tail feathers are due to ...?

(A) Selective absorption of light
(B) Selective re ection of light

(C) Sinterference of light
(D) Natural colour pattern of feathers

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