Home
Class 12
CHEMISTRY
KMnO(4) in alkaline medium changes to -...

`KMnO_(4)` in alkaline medium changes to -

A

`Mn^(3+)`

B

`MnO_(2)`

C

`MnO_(4)^(2-)`

D

`Mn(OH)_(4)^(-)`

Text Solution

Verified by Experts

The correct Answer is:
B
In alkaline solution, `KMnO_(4)` is first reduced to manganate and then to insoluble manganese dioxide. `2KMnO_(4)+H_(2)O overset("alkaline")rarr 2MnO_(2)darr + 2KOH+3[O]`
Promotional Banner

Topper's Solved these Questions

  • D - AND F - BLOCK ELEMENTS

    CHHAYA PUBLICATION|Exercise SOLVED NCERT EXEMPLAR PROBLEMS (Multiple Choice Question)|31 Videos

  • D - AND F - BLOCK ELEMENTS

    CHHAYA PUBLICATION|Exercise SOLVED NCERT EXEMPLAR PROBLEMS (Short Answer Type)|20 Videos

  • D - AND F - BLOCK ELEMENTS

    CHHAYA PUBLICATION|Exercise HIGHER ORDER THINKING SKILL (HOTS) QUESTIONS|28 Videos

  • COORDINATION COMPOUNDS OR COMPLEX COMPOUNDS

    CHHAYA PUBLICATION|Exercise PRACTICE SET 21|2 Videos

  • ELECTROCHEMISTRY

    CHHAYA PUBLICATION|Exercise PRACTICE SET 4(Answer the following questions)|14 Videos

Similar Questions

Explore conceptually related problems

Why SO_2 is a better reducing agent in alkaline medium as compared to that in acidic medium?

Hydrogen peroxide oxidises ["Fe"("CN")_(6)]^(4-) to ["Fe"("CN")_(6)]^(3-) in acidic medium but reduces ["Fe"("CN")_(6)]^(3-) to ["Fe"("CN")_(6)]^(4-) in alkaline medium. The other products formed are, respectively-

Hydrogen peroxide oxidises [Fe(CN)_(6)]^(4-) to [Fe (CN)_(6)]^(3-) in acidic medium but reduces [Fe(CN)_(6)]^(3-) to [Fe(CN)_(6)]^(4-) in alkaline medium . The other products formed are , respectively -

When KMnO_(4) reacts with KBr in alkaline medium and gives bromate ion, then oxidation state of Mn changes from +7 to-

Sulphur dioxide is a stronger reducing agent in alkaline medium than in acidic medium-explain.

In acidic medium , particles of the sol formed by SnO_(2) are positively charged. But in alkaline medium, particles of the sol carry a negative charge-Explain.

KMnO_(4) acts as an oxidising agent in alkaline medium. When alkaline KMnO_(4) is treated with KI, iodide ion is oxidised to -

Benzoylation of phenol in alkaline medium is known as

0.56 g of limestone was treated with oxalic acid to give CaC_2O_4 . The precipitate decolorized 45 ml of 0.2 N KMnO_4 in acid medium. Calculate % of CaO in limestone.