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Q.

Which one of the following process requires an oxidizing agent to occur?

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a

SO2→ SO4-2

b

CrO4-2→ Cr2O7-2

c

NO3-→ N2O

d

C2H4→ C2H6

answer is A.

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Detailed Solution

S+4O2→ S+6O4-2…….oxidation…..requires oxidizing agentCr+6O4-2→ Cr+62O7-2 ……………….no change is oxidation state N+5O3-→ N+12O …… reduction … requires reducing agentC2-2H4 → C2-3H6 …… reduction …requires reducing agent
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