What are the factors that affect the viscosity of a liquid?
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How is hardness of water caused?
is urea addition affecting the COD (chemical oxygen demand) & BOD (Biological oxygen demand)level? why?
Why do eye-glasses become fogged, when the wearer comes form the cold outdoors into a warm room ?
What is Heat of Nutralication ?
Why does a freely supended magnetic needle always point North and South ?
Why does a match-stick burn, when struck against the match-box surface
What is given off on burning a candle ?
What are the advantages of potentiometric titration?
What are filters? Why are they used?
Which is the main constituent in air ?
What is the reaction that occurs between iodine and sodium thiosulphate?
Explain the Properties of Gases ?