A) \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\]
B) \[{{(N{{H}_{4}})}_{2}}[TiC{{l}_{6}}]\]
C) \[VOS{{O}_{4}}\]
D) \[{{K}_{3}}[Cu{{(CN)}_{4}}]\]
Correct Answer: C
Solution :
| [c] |
| (1) In \[C{{r}_{2}}O_{7}^{2-}\], the valence shell electron configuration of Cr (VI) is \[3{{d}^{0}}\]. Thus \[Cr(VI)\] is diamagnetic but coloured due to the charge transfer spectrum. |
| (2) In\[{{(N{{H}_{4}})}_{2}}\]\[[TiC{{l}_{6}}]\], the valence shell electron configuration of Ti (IV) is\[3{{d}^{0}}\], thus, V (IV) is diamagnetic and colourless. |
| (3) In \[VOS{{O}_{4}}\], the valence shell electon configuration of V (IV) is \[3{{d}^{0}}\], thus V (IV) is paramagnetic and blue coloured due to d-d transition. |
| (4) In \[{{K}_{3}}[Cu{{(CN)}_{4}}]\], the valence shell electon configuration of Cu (I) is \[3{{d}^{0}}\], thus Cu (I) is diamagnetic and colourless. |
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