Why is estimation of copper done at 620 nm wave length?
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however ozone is havier than oxygen still ozone is up there in sky why?
What is Oxidation and Reduction?
is urea addition affecting the COD (chemical oxygen demand) & BOD (Biological oxygen demand)level? why?
Explain the Physical change?
How BIS Decedied the LSF value 0.66-1.02 with calculation.
What is the function of diethyl amine?
What is colorimetry?
Why is clinical thermometer used in preference to and ordinary Fahrenheit thermometer ?
In winter, on a cold morning, the cement feels colder to the foot than a carpet. Why ?
What is Daltons Atomic Theory ?
Which is the main constituent in air ?
Distinctive character of Organic Chemistry ?