1.

25ml of a 0.1M solution of a stable cation of transitional metal Z reacts exactly with 25ml of 0.04M acidified KMnO_4solution. Which of the following is most likely to reperesent the chance in oxidation state of Z correctly

Answer»

` Z^(+ )RARRZ^(2+)`
` Z^(2+)rarrZ^(3+)`
` Z^(3+) + 2^(4+)`
`Z^(2+)rarr2^(4+)`

SOLUTION : no.of milli equivalents of .Z.
= no . of milli equivalents of `KMnO_(4)`
`25 XX 0.1 xx n = 25 xx 0.04 xx 5`
`:. `n-factor for .Z. = `2"" :. Z^(2+) rarr Z^(4+)`


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