Sawaal
12
Q:

In nuclear reactor the speed of neutrons is slowed down by

A) heavy water B) ordinary water
C) Zinc rods D) molten caustic soda

Answer:   A) heavy water



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

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Answer & Explanation Answer: C) 78%

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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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Answer & Explanation Answer: B) Only Polyethylene

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Which of the following is NOT a compound?

 

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Answer & Explanation Answer: B) Milk

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