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Question

# Which of the following compounds does not contain peroxy linkages : BaO2, H2SO5, H2S2O3,

A
H2SO5
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B
BaO2
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C
H2S2O3
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D
both (a) and (b)
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Solution

## The correct option is C H2S2O3 The compound contains a peroxy linkage when: Calculated oxidation state is more the maximum oxidation state possible. First compound, BaO2 Let oxidation state of Ba be x. ⇒x+2×(−2)=0 ⇒x=+4 calcualted O.S.=+4. while maximum O.S. possible for Ba is +3. So, BaO2 contains a peroxy linkage. The structure of BaO2, Second compound, H2SO5 Let oxidation state of S be x. ⇒x+2×(+1)+5×(−2)=0 ⇒x=+8 calcualted O.S.=+8. while maximum O.S. possible for S is +6. So, H2SO5 contains a peroxy linkage. The structure of H2SO5, Third compound, H2S2O3 Let oxidation state of S be x. ⇒2x+2×(+1)+3×(−2)=0 ⇒x=+2 calcualted O.S.=+2. while maximum O.S. possible for S is +6. So, H2S2O3 does not contains a peroxy linkage. The structure of H2S2O3,

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