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Criteria of purity of organic compounds The purity of an organic compound can be determined by ascertaining its some physical constants such as m.p., b.p., defined gravity, re
Preparation of dihydric alcohols
how many methods to remove color impurities in chemical compounds?
Procedures for determination and monitoring of shelf life Direct shelf life determination requires batches of samples to be taken at significant stages in the development or m
The electronic configuration of chromium is: (1) [Ne]3s 2 , 3p 6 , 3d 4 , 4s 2 , (2) [Ne]3s 2 , 3p 5 , 3d 4 , 4s 1 , (3) [Ne]3s 2 , 3p 6 , 4s 2 ,
how can we identify the ammonical smell and punjent smell?
Which one of the following groupings represents a collection of isoelectronic species: (1) NA +, Ca 2+ , Mg 2+ (2) N3, F - , Na + (3) be, Al 3+ , Cl -
electrophilic substitution reactions and mechanisms
Nuclei contain uncharged neutrons and positively charged protons; these two particles with about the same mass are known as nucleons. The number of protons is the atomic number of
explain about law of chemical combinations in about 200 words?
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