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Which one of the following reagents can be used for differentiating the nitrates of `Cu^(2+)` and `Bl^(3+)`?A. Excess of waterB. `NH_4OH` (excess)C. Excess of KID. All of these |
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Answer» Correct Answer - D (A)`Cu^(2+)+H_2O`(excess) `to` no change `Bi^(3+)+NO_3^(-)+H_2O`(excess)`to BiO(NO_3)darr`(white)+`2H^+` (B)`Cu^(2+)+4NH_4OHto[Cu(NH_3)_4]^(+2)`(deep blue)+`4H_2O` `Bi^(3+)+3NH_4OHtoBi(OH)_3darr`(white)+`3NH_4^(+)` ( C)`Cu^(2+)+4I^(-)toCu_2I_2darr`(white)+`I_2` `Bi^(3+)+4I^(-)to[BiI_4]^(-)`(orange colour solution) |
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