A) \[S-S\] bond is present in \[{{H}_{2}}{{S}_{2}}{{O}_{6}}.\]
B) In peroxosulphuric add \[({{H}_{2}}S{{O}_{5}})\] sulphur is in + 8 oxidation state.
C) Copper powder along with \[A{{l}_{2}}{{O}_{3}}\] and \[{{K}_{2}}O\] is used as a catalyst in the preparation of \[N{{H}_{3}}\] by Haber's process.
D) Change in enthalpy is positive for the preparation of \[S{{O}_{3}}\] by catalytic oxidation of \[S{{O}_{2}}\]
Correct Answer: A
Solution :
\[H-O-\underset{\underset{O}{\mathop{\parallel }}\,}{\mathop{\overset{\overset{O}{\mathop{\parallel }}\,}{\mathop{S}}\,}}\,-\underset{\underset{O}{\mathop{\parallel }}\,}{\mathop{\overset{\overset{O}{\mathop{\parallel }}\,}{\mathop{S}}\,}}\,-O-H\] In \[{{H}_{2}}S{{O}_{5}}\] the oxidation number of O is +6 as two O are having peroxide bond.
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