How many elements have been discovered ?
What are filters? Why are they used?
What is the reaction that occurring between fas and potassium dichromate?
If you are given two liquids, which look like water, how can you, by two physical tests, prove which one of them may be water ?
Which is the hardest substances know ?
Why is clinical thermometer used in preference to and ordinary Fahrenheit thermometer ?
What is the role of mercuric sulphate?
What materials are needed in making glass ?
Mention a few advantages of photoelectric colorimetric determination.
what is the name of the material used in making the plates used for serving food in hotels?
Which substance has the highest specific heat ?
How BIS Decedied the LSF value 0.66-1.02 with calculation.
Why is acetone used for cleaning viscometer?