InterviewSolution
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InterviewSolution
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Assertion : Reduction of ZnO with carbon is done at `1100^(@)C`. Reason : At this temperature, `DeltaG^(@)` is negative and the process is spontaneous.A. Statement-1 is True, Statement-2 is True, Statement-2 is a correct explantion for Statement-1.B. Statement-1 is True, Statement-2 is True, Statement-2 is not a correct explantion for Statement-1.C. Statement-1 is True, Statement-2 is False.D. Statement-1 is True, Statement-2 is True. |
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Answer» Correct Answer - A All three oxidation curves for the carbon system lie above that for oxidation of zinc, until a temperature of approximately `1000^(@)C` is reached. At this point C is thermodynamicall capable of reducing ZnO to Zn. Since this temperature is greater than the boiling point of `Zn(907^(@)C)`, it will be formed as a vapour. The overall equaltion for reduction for redcution is `ZnO(s)+C(s) to Zn(g)+CO(g)` Therefore, (a) is correct. |
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