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Standard XII

Chemistry

Catalytic Transfer Hydrogenation

benzene is ox...

Question

benzene is oxidised by H202 in the presence of FeSO4 t

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Similar questions

Q. Assertion :Sulphur is oxidised by

H_{2} O_{2}

in presence of

F e (I I I)

. Reason:

F e (I I I)

oxidises sulphur to sulphate.

F e^{3 +}

is reduced to

F e^{2 +}

by using

Q. In alkaline medium

C l O_{2}

oxidises

H_{2} O_{2}

O_{2}

and itself gets reduced to

C l^{-}

. How many moles of

H_{2} O_{2}

are oxidised by

1

mole of

C l O_{2}

100

mL of

H_{2} O_{2}

is oxidised by

100

mL of

0.01 M

K M n O_{4}

in acidic medium (

M n O_{4}^{⊝}

reduced to

M n^{2 +}

100

mL of the same

H_{2} O_{2}

is oxidised by

V

mL of

0.01 M

K M n O_{4}

in basic medium (

M n O_{4}^{⊝}

reduced to

M n O_{2}

). Hence,

V

is :

Question 6

A dilute ferrous sulphate solution was gradually added to the beaker containing acidified permanganate solution. The light purple colour of the solution fades and finally disappears.

Which of the following is the correct explanation for the observation?

(a) ${KMnO}_{4}$ is an oxidizing agent, it oxidises ${FeSO}_{4}$ .
(b) ${FeSO}_{4}$ acts as an oxidizing agent and oxidises ${KMnO}_{4}$ .
(c) The colour disappears due to dilution; no reaction is involved.
(d) ${KMnO}_{4}$ is an unstable compound and decomposes in presence of ${FeSO}_{4}$ to a colourless compound.

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