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Category: Everyday Science MCQs

Greenhouse effect is due to presence of __________ in earth’s atmosphere.

(A) O2 and N2
(B) CO and N2
(C) CO2 and water vapours
(D) O2 and water vapours

Answer: (C) CO2 and water vapours

Evaporation takes place from the surface of a liquid at:

(A) Low temperature only
(B) High temperature only
(C) Room temperature only
(D) All temperatures

Answer: (D) All temperatures

According to Archimedes, upthrust is equal to:

(A) Weight of displaced liquid
(B) Volume of displaced liquid
(C) Mass of displaced liquid
(D) Density of the displaced liquid

Answer: (A) Weight of displaced liquid

Water reaches to the magma that changes water into steam. The steam contains:

(A) Geothermal energy
(B) Chemical energy
(C) Nuclear energy
(D) Electric energy

Answer: (A) Geothermal energy

A refrigerator works mainly on the principle of:

(A) Thermodynamics
(B) Electricity
(C) Mechanics
(D) Solid state physics

Answer: (A) Thermodynamics

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