What is the chief commercial use of Phosphorus ?
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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 ?
What is the safety curtain in cinema or theatre made off ?
Is water element or compound ?
Why is disodium salt of edta preferred to edta?
Why is the color of the indicator drop remains the same at the end point?
what is ppm?how to prepare 75 ppm?
when we covert any substance into vapour state from solid state, is it ionized or not?
pH is having unit?
Why is the total eclipse of the earth a rare phenomenon ?
What is colorimetry?
What is Displacement Reaction .
Why is ammonia-ammonium chloride buffer added?