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 Community Discussion Question:
PROBLEM
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![[Post New]](/templates/default/images/icon_minipost_new.gif) 20 Jan 2008 18:22:45 IST
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WHICH OF THE FOLLOWING COMPOUNDS IS EXPECTED TO BE COLOURED?
A) Ag2SO4 B) CuF2 C) MgF2 D) CuCl FOR ME REASON IS MORE IMPORTANT THAN ANSWER BUT ANSWER IS MUST
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"If u win u need not have to explain and if u lose thn u should not be there to explain"
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20 Jan 2008 19:17:04 IST
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ans B.
cos Cu2+ has EC 4s0-3d9.
in A and D it is ns0-(n-1)d9 EDIT: it should be ns0-(n-1)d10
while Mg2+ has completed octet.
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this reply: 9 points
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22 Jan 2008 18:13:19 IST
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compounds having incompletely filled d orbitals are supposed to be coloured
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22 Jan 2008 18:33:12 IST
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see if there is atleast one unpaired electron..........
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22 Jan 2008 18:37:01 IST
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CuF2 cuz only CU2+ has unpaired electrons in it.. presence of unpaired electron in d same subshell is required for formation of coloured compounds..
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