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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Which of the following is a ferromagnetic material ...?

(A) Tungsten
(B) Aluminium

(C) Copper
(D) Nickel

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Second layer of Earth’s atmosphere is__________...?

(A) Stratosphere
(B) Mesosphere

(C) Troposphere
(D) Thermosphere

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The color of a sedimentary rock is often mostly determined by___________...?

(A) Zinc
(B) Iron

(C) Calcium
(D) None of these

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Seedless vascular plants are...?

(A) Bryophytes
(B) Gymnosperms

(C) Pteridophytes
(D) None of these

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Asthma is due to the exposure to a type of environment pollution Which one...?

(A) Air
(B) Water

(C) Land
(D) None

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Thermal energy transfer required to change a liquid into gas without changing its temperature is called...?

(A) Latent heat of freezing
(B) Latent heat of vaporization

(C) Latent heat of boiling
(D) Latent heat of melting

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What are the primary colors of Pigment...?

(A) White, Black, Blue
(B) Red, Yellow, Blue

(C) Red, Orange, Blue
(D) Red, Green, Blue

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Which of the following is the main characteristic of electromagnets that makes them useful in cranes and doorbells...?

(A) They are very strong
(B) They are permanent

(C) They can be switched on and off
(D) They are very heavy

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Which of the following would be most useful in testing if a substance is either an acid or a base...?

(A) pH indicator strips
(B) Acid-base indicator

(C) Litmus paper
(D) Filter paper

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