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Grade 11Inorganic Chemistry

Identify the complexes which are expected to be coloured. Explain (IIT JEE 1994 – 2 Marks)
(i) [Ti(NO3)4]
(ii) [Cu(NCCH3)4]+ BF4-
(iii) [Cr(NH3)6]3+3CI-
(iv) K3 [VF6]

Profile image of Simran Bhatia
12 Years agoGrade 11
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1 Answer

Profile image of Aditi Chauhan
12 Years ago
For the explanation of colouration of complexes, first of all find out the number of unpaired electrons present in outer available d-obritals
(i) [Ti(NO­3)4] ; 22Ti4+ : [Ar] 3d0 4s0
(ii) [Cu(NC CH3)4]+ BF_{4}^{-}; 29Cu+ : [Ar] 3d10 4s0
(iii) [Cr(NH3)6]+3 3CI-; 24Cr3+ : [Ar] 3d3 4s0
(iv) K3 [VF6]; 23V+3 : [Ar] 3d2 4s0

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