Differentiate between modern periodic table and mendeleevs table?
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However ozone is heavier than oxygen still ozone is up there in sky why?
Why is it dangerous to have a coal fire burning with doors and windows closed ?
Explain the Purification of Organic Compounds ?
Explain the difference between the Metals and Metallurgy ?
What is the basicity/acidity of na2co3
What is the purest form of water ?
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What is the difference between fractionation and distillation?
What is chemical oxygen demand?
What is fluidity of a liquid?
what is the difference between vector and tensor?
What is the prime constituents of cement?
Why ph scale range is 14? Why it is not less or not greater than 14?