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Identify the product and the colour when...

Identify the product and the colour when `MnO_(2)` is fused with solid KOH in the presence of oxygen `(O_(2))`

A

`KMnO_(4)`(purple)

B

`K_(2)MnO_(4)`(dark green)

C

`MnO_(2)` (Colourless)

D

`Mn_(2)O_(3)` (brown)

Text Solution

Verified by Experts

The correct Answer is:
B
`2MnO_(2)to4KOH+O_(2) to underset("(Green)")(2K_(2)MnO_(4))+2H_(2)O`
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MnO_(2) is the most important oxide of manganese , MnO_(2) occurs natually as the black coloured mineral pyrolusite. It is an oxidising agent, and decomposes to Mn_(3)O_(4) on heating to 530^(@) C. It is used in the preparation of potassium permanaganate and in the productioon of Cl_(2) gas. Over half million tonnes per year of MnO_(2) is used in dry batteries. Q. When MnO_(2) is fused with KOH in the presence of air, the product formed is:

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DINESH PUBLICATION-D-AND -F BLOCK ELEMENTS-Select the correct answer
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  2. Which of the following species has maximum magnetic moment?

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  8. Which of the statement is not true?

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  13. Which of the following lanthanoid ion is diamagnetic?

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  15. Which of the following oxidation states is the most common among the l...

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