1.

Among the following the compound that is both paramagnetic and coloured isA. `K_(2)Cr_(2)O_(7)`B. `(NH_(4))_(2) [TiCl_(6)]`C. `VOSO_(4)`D. `K_(3) [Cu(CN)_(4)]`

Answer» Correct Answer - C
(a) `Cr_(2) O_(7)^(2-) Cr^(+6)` is `d^(0)`
(b) `2 xx 1 + x + 6 xx - 1 = 0`
`x = 4`
`Ti^(4+)` is `d^(0)`
(c ) `x - 2 - 2 = 0`
`x = 4` `V^(4+)`
is `d^(1)`
(d) `3 xx 1 + x + 4 xx - 1 = 0`
`x = + 1`
`Cu^(+)` is `d^(10)`


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