Which of the following principleis used to produce ‘low-temperatures’ ...? Mcqs

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Which of the following principleis used to produce ‘low-temperatures’ ...?

(A) Super conductivity
(B) Joule-Kelvin effect

(C) Thermo-electric effect
(D) Adiabatic demagneti-sation

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What is the key role of decomposers...?

(A) Break down living plants
(B) Break down dead animals

(C) Provide food for animals
(D) None

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Skin has ___________ layers...?

(A) One
(B) Two

(C) Three
(D) Four

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Water soluble Vitamins are _________...?

(A) A & D vitamins
(B) B & C vitamins

(C) A & K vitamins
(D) B & K vitamins

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The number of neutron(s) in Protium is ______...?

(A) One
(B) Three

(C) Two
(D) No

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‘Christian Friedrich Schönbein’ discovery is___________...?

(A) Ozone
(B) Radium

(C) Cholorine
(D) Neutron

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who invented bulb...?

(A) Philips
(B) Robert

(C) Edison
(D) Willium

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The Earth is rotating constantly and in ________ direction....?

(A) South
(B) North

(C) East
(D) Same

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Who discovered that the earth was not the center of the universe...?

(A) Aristotle
(B) Nicolaus Copernicus

(C) Sir Isac Newton
(D) None

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The _____ is the largest natural source of light...?

(A) Sun
(B) Moon

(C) Star
(D) None of these

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