PAS is a drug used in the treatment of
Para-amino salicylic acid (PAS) is used in the treatment of Tuberculosis.
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Conductivity in a metal results from the metal atoms having
The outer most electrons that are free to move are called valency electrons that are responsible for the conductivity in the metal atoms.
The function of nitrogen in air is
If air contained all oxygen and no nitrogen, everything would have burnt off
Which of the following is not a pure substance?
Milk is not a pure substance since it has so many constituents that can be separated physically.
Compounds are pure substances formed from elements unlike mixtures.
Covalent bonds hold atoms together because they
Covalent bonds hold atoms together because the attraction between the positively charged nuclei and the negatively charged shared electrons is greater than the repulsions between the nuclei themselves.
What is the freezing point of water in Celsius?
The freezing point of water and melting point is 0 °C or 32 °F. The temperature may be lower if supercooling occurs.
Nucleons are
Browning of paper in old books is caused by
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