**Match Column I with Column II (Oxidation state of underlined element):**
**Column I:**
(A)
(B)
(C)
(D)
**Column II:**
(p) +2
(q) +6
(r) -3
(s) +6

Question

**Match Column I with Column II (Oxidation state of underlined element):**
**Column I:**
(A) $\underline{Cr}O_5$
(B) $H_2\underline{S}_2O_8$
(C) $\underline{P}H_3$
(D) $Na_2\underline{S}_2O_3$
**Column II:**
(p) +2
(q) +6
(r) -3
(s) +6

Prashant Kotian · Accepted Answer

Correct answer: A. **Logic:**
(A) has a butterfly structure with 4 peroxide oxygens (-1) and 1 oxo oxygen (-2). is +6.
(B) has one peroxide linkage. is in +6.
(C) In , Hydrogen is +1, so is -3.
(D) In , average O.S. of is +2 ().

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