What is photoelectric colorimeter?
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What is glacial acetic acid?
What is the composition of ferroin?
The heat of the sun reaches us and the intervening air is not heated up Why ?
Why ate shadows longer at the end of the day ?
Explain the Valency?
Explain the Hard and Soft water ?
why helium does not react with other elements?
Why is alum added to purify water ?
What is wave number?
Why does the water in tanks and ponds not freeze in winter ?
Why is the color of the indicator drop remains the same at the end point?
What are constituents of brass?