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When MnO(2) is fused with KOH, a coloure...

When `MnO_(2)` is fused with `KOH`, a coloured compound is formed. The product and its colour is

A

`K_(2)MnO_(4)`, purple colour

B

`KMnO_(4)`,purple

C

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

D

`Mn_(3)O_(4)`, black

Text Solution

Verified by Experts

The correct Answer is:
A
`2MnO_(2)+4KOH+O_(2)rarrunderset("purple colour")(2K_(2)MnO_(4))+2H_(2)O`
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-D - AND F-BLOCK ELEMENTS-Exercise 2 (Miscellaneous Problems)
  1. When I^(Theta) is oxidised by MnO(4)^(Theta) in an alkaine medium, I^(...

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  2. When MnO(2) is fused with KOH, a coloured compound is formed. The prod...

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  3. MSO(4)overset(NH(4)OH)rarr underset("White")(Xdarr)underset("Excess")o...

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  4. Which of the following arrangements does not represent the correct ord...

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  5. The spin only magnetic moment of Fe^(3+) ion (inBM) is approximately

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  6. For which of the following pairs, magnetic moment is same ?

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  7. A comapound in which a metal ion M^(x+)(Z=25) has a spin only magnetic...

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  8. Within each transition series, the oxidation states

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  9. Which one of the following reactions will occure on heating AgNO(3) ab...

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  10. Among the following, the compound that is both paramagnetic and colour...

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  11. Number of electrons in 3d-orbital of V^(2+),Cr^(2+),Mn^(2+) and Fe^(2+...

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  12. A soild, A which has photographic effect reacts with the solution of a...

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  13. Amongst [TiE(6)]^(2-), [CoF(6)]^(3-), Cu(2)Cl(2) and [NiCl(4)]^(2-) [A...

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  14. At pH=4,CrO(4)^(2-) exists as

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  15. When Kl (excess) is added to (I)CuSO(4) , (II) HgCl(2) (III) Pb(N...

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  16. In which of the following complexes the metal ion is in zero oxidation...

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  17. Consider the followinh reaction of permaganate ions. (I)10I^(-)+2Mn...

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  18. Which of the following statement (s) is/are correct when a mixture of ...

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  19. When KMnO(4) solution is added to hot oxalic acid solution, the decolo...

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  20. What happen when a solution of potassium chromate is treated with an e...

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