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Q. What do you mean by Permissible level ? To regulate and enforce safety about the use of these synthetic colours and dyes PFA, 1954 has covered their use in part IV comprisin
what is the difference between molarity and normality
Fractional crystallisation- Purification of organic compound The method of separation of diverse components of a mixture by repeated crystallisations is termed as fractional cr
why 4f electrons do not take part in bonding?
define ostwals dilution law
why is hcl used in acid radical
In the transition of Zn atoms to Zn ++ ions there is a decrease in the: (1) Number of valency electrons (2) Atomic weight (3) Atomic number (4) Equivalent weight A
How are the following conversions carried out? (i) Benzyl chloride to benzyl alcohol, (ii) Methyl magnesium bromide to 2- methlpropan -2-ol,
What is T in the indicator Eriochrome Black-T used for the determination of hardness of water?
Q. What is Oxidation Numbers? Ans. Chemists find it useful to describe the oxidation states of an element by means of oxidation numbers. The oxidation number of an element
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