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Which of the following electronic configuration is not possible according to Hund's rule:
(1) 1s2 2s2
(2) 1s2 2s1
(3) 1s2 2s2 2p1x 2py1y 2p1x
(4) 1s2 2s2 2p2x
(5) 1s2 2s2 2p2x 2p1y 2p1z
Ans: 1s2 2s2 2p2x
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what is the lewis structure of lactic acid?
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why f elememnts kept sepertaly in periodic table
Why it called p-block elements?
Phenol + HNO3(in prescence of sulphuric acid) --> 2-nitrophenol + 4-nitrophenol.
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