Exposure to sunlight helps a person improve his health because ________...? Mcqs

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Exposure to sunlight helps a person improve his health because ________...?

(A) Resistance power increases
(B) The infrared light kills bacteria in the body

(C) The ultraviolet rays convert skin oil into Vitamin D
(D) The pigment cells in the skin get stimulated and produce a healthy tan

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Identify the monoatomic molecule among the following...?

(A) Helium
(B) Ozone

(C) Hydrogen
(D) Nitrogen

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A body is in equilibrium when it has ______...?

(A) Uniform speed
(B) Uniform acceleration

(C) Both a and b
(D) Zero acceleration

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According to Quark theory, there are _________ elementary particles....?

(A) Three
(B) Six

(C) Nine
(D) Ten

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Imaginary horizontal line on atmosphere which represent equal atmospheric pressure...?

(A) Isobar
(B) Isotope

(C) Isotone
(D) None of these

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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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Which of the following source of energy is caused by uneven heating of earth’s surface...?

(A) Wind
(B) Solar

(C) Biomass
(D) None of these

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Retinol is the chemical name of...?

(A) Vitamin A
(B) Vitamin B

(C) Vitamin C
(D) Vitamin K

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To measure the speed of an approaching car a police officer shines...?

(A) light waves on it
(B) microwaves on it

(C) radio waves on it
(D) ultra high frequency waves on it

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Which is least Conductor of Electricity among the following...?

(A) Wood
(B) Copper

(C) Iron
(D) Water

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