If , and are Mn containing compounds and oxidation state of Mn in is more than O.St. of Mn in , then incorrect statements about , and is/are (i) Both & are coloured due to transition (ii) When is heated at then and are formed (iii) is not ve

Question

${MnO}_{2} \to_{{KNO}_{3} / air}^{fused KOH} x \overset{H^{+}}{\to} y + z + H_{2} O$

If $x$ , $y$ and $z$ are Mn containing compounds and oxidation state of Mn in $y$ is more than O.St. of Mn in $z$ , then incorrect statements about $x$ , $y$ and $z$ is/are

(i) Both $x$ & $y$ are coloured due to $d - d$ transition
(ii) When $y$ is heated at $513 K$ then $x$ and $z$ are formed
(iii) $y$ is not very soluble in $H_{2} O$
(iv) Both $x$ & $y$ are tetrahedral

Smart Achievers · Accepted Answer

(3)

$x = K_{2} M n O_{4}, y = K M n O_{4}, z = M n O_{2}$

Solution

1 i & iii

2 i & ii

3 i only

4 ii & iv

Ans.
(3)

$x = K_{2} M n O_{4}, y = K M n O_{4}, z = M n O_{2}$

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