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The valency of phosphorus in H3 PO4 is:
(1) 2
(2) 5
(3) 4
(4) 1
Ans: 5
Q. Show the Occurrence of Metals? Earth's crust and sea are the two main sources of metals. In the earth's crust metals occur both in the combined state in the form of minerals
Few methods preparation of cyacloalken
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explanation on the periodic tables
It is Hydrated Potassium Aluminium Sulfate [ KAl(SO4)2·12H2O ].
Two or more different types of monomers joined together to form giant molecule is called coopolymerisation. ex--- nylon6,6 --it is a combination of hexamethylenediamine and a
Which of the following is isoelectronic with carbon atom: (1) Na + (2) Al +3 (3) O 2- (4)N + Ans: N +
describe and explain the charater tables of water and amoniaa molecule
1
what are the properties of acid halides
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