KVPY SX SB Exam 2015 Question Paper

Question : 109 of 120

Marks: +1, -0

MnO

_2

when fused with KOH and oxidized in air gives a dark green compound X. In acidic solution, X undergoes disproportionation to give an intense purple compound Y and MnO

_{2}

. The compounds X and Y, respectively, are

$K_2MnO_4 \and KMnO_4$
$Mn_2O_7 \and KMnO_4$
$K_2MnO_4 \and Mn_2O_7$
$KMnO_4 \and K_2MnO_4$

Validate

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