| The following redox reaction is balanced by which set of coefficients? |
| \[aZn+bNO_{3}^{-}+c{{H}^{+}}\to dNH_{4}^{+}+e{{H}_{2}}O+fZ{{n}^{2+}}\] |
A)
a-1 b-1 c-10 d-1 e-3 f-1
B)
a-2 b-2 c-10 d-2 e-3 f-2
C)
a-4 b-2 c-10 d-1 e-3 f-4
D)
a-4 b-1 c-10 d-1 e-3 f-4
Correct Answer: D
Solution :
| \[Zn\to Z{{n}^{2+}}+2{{e}^{-}}\] ? (i) |
| \[8{{e}^{-}}+10{{H}^{+}}+NO_{3}^{-}\to NH_{4}^{+}+3{{H}_{2}}O\] ? (ii) |
| Operate eq. \[(i)\times 4+eq.(ii)\times 1\] |
| \[4Zn+10{{H}^{+}}+NO_{3}^{-}\to 4Z{{n}^{2+}}+NH_{4}^{+}+3{{H}_{2}}O\] |
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