What is the unit of ph?
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how to do heavy metal test for colour sample?
What is photoelectric colorimeter?
Which gas used for purifying, air in underground enterprises ?
Explain the Matter?
What is the acidity of a base
How is petroleum manufactured?
What is the reaction that occurring between fas and potassium dichromate?
How is librated iodine estimated?
What do you mean by UV cut off limit
Why is the bottom of a kettle blackened and top polished?
What are constituents of brass?
What are the soldiers in an army, while crossing a bridge ordered to go out of step?