| I. \[C{{r}_{2}}O_{7}^{2-}+2\overline{O}H\xrightarrow{{}}2Cr_{4}^{2-}+{{H}_{2}}O\] |
| II. \[Zn+CuS{{O}_{4}}\xrightarrow{{}}\text{ }ZnS{{O}_{4}}+Cu\] |
| III. \[2MnO_{4}^{-}+3M{{n}^{2+}}+4\overline{O}H\xrightarrow{{}}\] \[5Mn{{O}_{2}}+2{{H}_{2}}O\] |
| IV. \[2C{{u}^{+}}\xrightarrow{{}}Cu+C{{u}^{2+}}\] |
A) I, II
B) I, III
C) III, IV
D) II, III, IV
Correct Answer: D
Solution :
[d] II, III and IV are redox reactions.
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