SATHEE: D-And F-Block Elements Ques 32

D-And F-Block Elements Ques 32

Question: $K M n O_{4}$ in basic medium is reduced to

[Orissa JEE 2005]

Options:

A) $K_{2} M n O_{4}$

B) $M n O_{2}$

C) $M n {(O H)}_{2}$

D) $M n^{2 +}$

Show Answer

Answer:

Correct Answer: B

Solution:

$K M n O_{4}$ is first reduced to manganate and then to insoluble manganese dioxide. Colour changes first from purple to green and finally becomes colourless.

$2 K M n O_{7} + 2 K O H \to 2 K_{2} M n O_{4} + H_{2} O + O$

$2 K_{2} M n O_{4} + 2 H_{2} O \to 2 M n O_{2} + 4 K O H + 2 O$

$2 K M n O_{2} + H_{2} O \overset{a l k a l i n e}{\to} 2 M n O_{2} + 2 K O H + 3 [O]$

D-And F-Block Elements Ques 32

Question: $K M n O_{4}$ in basic medium is reduced to

Options:

Answer:

Solution:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

D-And F-Block Elements Ques 32

Question: KMnO4 in basic medium is reduced to

Options:

Answer:

Solution:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

Menu

Question: $K M n O_{4}$ in basic medium is reduced to