Question

Which of the following statement is correct?

A

bond is present in

B

In peroxosulphuric acid sulphur is in +8 oxidation state

C

Copper powder along with and is used as a catalyst in the preparation of by Haber's process

D

Change in enthalpy is positive for the preparation of by catalytic oxidation of

Hard

Solution

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Correct option is
A

bond is present in

bond is present in In , the oxidation number of is +6 as two are having peroxide bond.
Preparation of by catalytic oxidation of is exothermic.

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