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$K_{2} {MnO}_{4}$ is stable in solution at $pH \geq 12$

${KMnO}_{4}$ produces the green solution on heating with cone. $NaOH .$

${Sr}^{2 +}$ and ${Ba}^{2 +}$ ions can be distinguished by addition of $({Na}_{2} {CrO}_{4} + AcOH)$ solution.

All are correct.

answer is D.

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Detailed Solution

$K_{2} {MnO}_{4}$ is stable in solution when its PH is grater than the 14.

When potassium permanganate is heated, it creates potassium manganate, manganese dioxide, and oxygen gas. This indicates that heat is absorbed in the reaction, making it an example of an endothermic reaction.

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