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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 chemical of Boron and aluminium? Boron and aluminium when heated with nitrogen torn the nitrides BN and AIN Nitrides of Ga and in are formed by heating the elements
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v CO has same electrons as or the ion that is isoelectronic with co is
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