Sawaal
1
Q:

By which of the following processes are metals of high reactivity extracted from purified molten ore?

A) Reduction by an appropriate reducing agent B) Roasting
C) Electrolysis D) Calcination

Answer:   C) Electrolysis



Explanation:
Subject: Chemistry
Exam Prep: Bank Exams , AIEEE
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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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Answer & Explanation Answer: B) Milk

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