InterviewSolution
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InterviewSolution
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Which of the following reactions do not involve oxidation reduction ? I. `2Cs+2H_(2)Orarr2CsOH+H_(2)` II. `2CuI_(2)rarr2CuI+I_(2)` III. `NH_(4)Br+KOHrarrKBr+NH_(3)+H_(2)O` IV. `4KCN+Fe(CN)_(2)rarrK_(4)[Fe(CN)_(6)]`A. `I,II`B. `I,III`C. `I,III,IV`D. `III,IV` |
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Answer» Correct Answer - D i. `{:(,RbrarrRb^(1)+e^(-)("Oxidation"),,,),(H_(2)O+,e^(-)rarroverset(ө)OH+(1)/(2)e^(-)("Oxidation"),,,):}]` Hence, redox reaction. ii. `{:(e^(-)+,Cu^(2+)rarrCu^(1+)("Reduction"),,,),(,2I^(ө)rarrI_(2)+2e^(-)("Reduction"),,,):}]` Hence, redox reaction iii. `underset(x=-3)overset(o+)(NH_(4))rarrunderset(x=-3)(NH_(3))`(No change in oxidation reaction). Hence, reaction is not redox. iv. No change in the oxidation number of either `Fe^(2+)` or `CN^(ө)` in both reactant and product, hence, not work reaction. |
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