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Identify the correct statement(s) :...

Identify the correct statement(s) :

A

The oxidation number of Cr in `CrO_5` is `+6`.

B

`DeltaH gt DeltaU` for the reaction `N_(2)O_(4)(g) to 2NO_(2)(g)`, provided both gases behave ideally.

C

pH of 0.1 N `H_(2)SO_(4)` is less than of 0.1 N HCl at `25^(@)` C

D

`(RT)/F = 0.0591` volt at `25^(@)` C.

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