What are hard waters?
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What is the effect of the flashes of lightning during a thunderstorm ?
How is brass solution prepared?
What is wave number?
What is the unit of ph?
why helium does not react with other elements?
What are the electrodes used in potentiometer titration?
What is molar conductivity?
What is si unit of viscosity-coefficient?
Explain the process of spontaneous combustion?
is urea addition affecting the COD (chemical oxygen demand) & BOD (Biological oxygen demand)level? why?
What is the difference between fractionation and distillation?
How many elements have been discovered on the Periodic Table?