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Which of the following reactions involve neither oxidation, non reduction ?
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a
CrO4−2⟶Cr2O7−2
b
Cr⟶CrCl3
c
Na⟶Na+
d
2SO3−2⟶S4O6−2
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Correct option is A
Considering that oxidation involves increase in oxidation number while reduction involves decrease in oxidation number, in a redox reaction, we have: (a) Cr+6O4−2⟶Cr2+6O7−2(b) Cr2⟶Cr+3Cl3(c) Na0⟶Na+(d) 2S2+2O3−2⟶S42.5O6−2From above, we find that in reaction (a), neither the oxidation number of Cr increases nor decreases from +6.Talk to our academic expert!
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