Sawaal
87
Q:

 A mixture of sand and naphthalene can be separated by

A) Fractional distillation B) Sublimation
C) Chromatography D) Any of them

Answer:   B) Sublimation



Explanation:
Subject: Chemistry
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The percentage of nitrogen in the air is about

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Air ___________________ are the substances which contaminate the air.

A) Reactants B) Irritants
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Answer & Explanation Answer: D) Pollutants

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By using which foam the Researchers from Indian Institute of Technology – Bombay have made a low cost piezo resistive vibration sensor?

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