Sawaal
4
Q:

The oldest known organic compound is

A) Urea B) Methane
C) Acetic acid D) Benzene

Answer:   C) Acetic acid



Explanation:

In the form of vinegar, acetic acid is known from very early times. It is got by oxidation of fermented liquors (10-15%, alcohol) by air under the influence of a bacteria called 'mycoderma acetic'

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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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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