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Q. Ca +2 = 20 ppm, Mg +2 = 25 ppm, CO 2 = 30 ppm, HCO - 3 = 150, K + = 10 ppm. Calculate the lime (87% pure) and soda (91% pure) required softening 1 million litt
Carbon And its Compounds Carbon is a typical non-metal present in earth's crust to the extent of 0,02% by mass. All living organisms contain carbon and hydrogen as their ess
What are the most significant properties of permanent magnetic materials? Explain. Ans: The most significant properties of permanent magnetic materials are (i) Remanen
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what are imperfection in solids
Edible colours - Chemicals in food Edible colours employed for food are mainly dyes. The make use of food dyes is specifically wide spread. They are utilized to colour everythi
Tests of unsaturation - Bromine - carbon tetrachloride test The compound is liquefying in carbon tetrachloride or chloroform and after that a few drops of 5% bromine solution i
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out of Kr and Rb+ ,which has greater size and why?
Calculate velocity of electron in bohr first orbit of hydrogen atom
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