The process of change from solid directly to vapour is called MCQ with Answer and Explanation

The process of change from solid directly to vapour is called
A. Freezing
B. Sublimation
C. Melting
D. Condensation
Answer: Option B
Solution (By JKSSB Mock Tests)
Sublimation: solid → gas without liquid phase. Example: camphor, naphthalene balls, dry ice (solid CO₂). Deposition is reverse. Latent heat of sublimation involved.

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The scientist who formulated the universal law of gravitation is:
A. Johannes Kepler
B. Galileo Galilei
C. Albert Einstein
D. Isaac Newton

Correct Answer: Option D


Explanation:
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The time period of a satellite in geostationary orbit is
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Correct Answer: Option D


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The image formed by a plane mirror is
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Correct Answer: Option B


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