MnO2 when fused with KOH and oxidised in air gives a dark green compound X. In acidic solution, X undergoes disproportionation to give an intense purple compound Y and MnO2. The compounds X and Y, respectively, are

Question

MnO2 when fused with KOH and oxidised in air gives a dark green compound X. In acidic solution, X undergoes disproportionation to give an intense purple compound Y and MnO2. The compounds X and Y, respectively, are (A) K2MnO4 and KMnO4 (B) Mn2 and KMnO4 (C) K2MnO4 and Mn2 (D) KMnO4 and K2MnO4

Tardigrade Admin · Accepted Answer

MnO2, when fused with KOH and oxidised in air gives a dark green compound, X, i.e. potassium manganate (K2MnO4). In acidic solution, K2MnO4 undergoes diproportionation to give an intense purple solution of potassium permanganate Y and MnO2. <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/physics/72121a02c4893fb505a23fae04e4ae37-.jpeg" />

Q. $M n O_{2}$ when fused with $K O H$ and oxidised in air gives a dark green compound $X$ . In acidic solution, $X$ undergoes disproportionation to give an intense purple compound $Y$ and $M n O_{2}$ . The compounds $X$ and $Y,$ respectively, are

$K_{2} M n O_{4}$ and $K M n O_{4}$

$M n_{2}$ and $K M n O_{4}$

$K_{2} M n O_{4}$ and $M n_{2}$

$K M n O_{4}$ and $K_{2} M n O_{4}$

$M n O_{2}$ , when fused with $K O H$ and oxidised in air gives a dark green compound, $X,$ i.e. potassium manganate $(K_{2} M n O_{4})$ . In acidic solution, $K_{2} M n O_{4}$ undergoes diproportionation to give an intense purple solution of potassium permanganate $Y$ and $M n O_{2}$ .

Q. MnO2​ when fused with KOH and oxidised in air gives a dark green compound X. In acidic solution, X undergoes disproportionation to give an intense purple compound Y and MnO2​. The compounds X and Y, respectively, are

K2​MnO4​ and KMnO4​

Mn2​ and KMnO4​

K2​MnO4​ and Mn2​

KMnO4​and K2​MnO4​