What is the function of diethyl amine?
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What are the constituents of cements?
What is modern definition(iupac) of ph?
Which gas is used in hospitals for the artificial respiration ?
how to do heavy metal test for colour sample?
Why would we all suffocate, if all the green plants were killed ?
How is the measurement of ph made?
What is Atomic number?
Why are substances like caustic soda and calcium chloride called hygroscopic substances ?
Why is the percentage of oxygen today the same as it was thousands years ago, even though the whole world inhals it?
Explain the Atomic Molecular Theory ?
Why it is advised to boil water before drinking ?
Which gas used for purifying, air in underground enterprises ?