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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]

Simran Bhatia , 11 Years ago
Grade 11
anser 1 Answers
Aditi Chauhan
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
Last Activity: 11 Years ago
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