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The oxidation number of Mn in the produc...

The oxidation number of Mn in the product of alkaline oxidative fusion of `MnO_(2)` is

A

2

B

3

C

4

D

6

Text Solution

Verified by Experts

The correct Answer is:
D
`2MnO_(2)+4KOH+O_(2)overset("Fusion"" ")(rarr)2K_(2)MnO_(4)+2H_(2)O`
Oxidation number of `Mn "in" K_(2)MnO_(4)` is
`2xx(1)+X+4(-2)=0
implies " "X=+6`
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-D - AND F-BLOCK ELEMENTS-Exercise 2 (Miscellaneous Problems)
  1. Which of the following statement (s) is /are correct? (I) CuS is wh...

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  2. Cuprous ion is colourless, while cupric ion is colured because

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  3. The oxidation number of Mn in the product of alkaline oxidative fusion...

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  4. The 3d-metal ion are generally paramagnetic in nature because

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  5. the caculated magnetic moment of a divalent ion of an atomic number 2...

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  6. Four successive members of the first row transition elements are liste...

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  7. Among the following series of transition metal ions, the one in which ...

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  8. The colourless species is

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  9. Amongst the following, the lowest degree of paramgnetism per mole of t...

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  10. Which do not decolourise KMnO(4) in aqueous solution?

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  11. Potassium permaganate acts as oxidant in alkaline and acidic media. Th...

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  12. A certain metal will liberate hydrogen from dilute acids. It will reac...

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  13. Cu^(2+) has a stronger polarising power than that of Ca^(2+) because

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  14. On addition of AgNO(3) to four different test tubes containing differe...

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  15. Which of the following compounds will show magnetic moment of 1.72 BM...

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  16. Which of the following statement (s) is /are correct? (I) In acidic ...

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  17. Which of the following paires have same radii?

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  18. Zn gives H(2) gas with H(2)SO(4) and HCl but not with HNO(3) because

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  19. Which of the statements (s) is/are not true?

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  20. When H(2)O(2) is shaken with an acidified solution of K(2)Cr(2)O(7) in...

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