Assertion :Reduction of $Z n O$ with carbon is done at $1100^{0} C$ Reason: $△$ $G^{0}$ is negative at this temperature thus, process is spontaneous.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect and Reason is correct

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
As can be sen from the Ellingham diagram, the free energy change for the formation of oxide from zinc becomes positive when temperature is greater than $1100^{0} C$ .
Thus for the reduction of the oxide of zinc to zinc, the free energy change becomes negative.
Hence, the reaction becomes spontaneous.
So, reduction of ZnO with carbon is done at $1100^{0} C$ .

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Assertion :Reduction of ZnO with carbon is done at 11000C Reason: △G0 is negative at this temperature thus, process is spontaneous.

Assertion :Reduction of $Z n O$ with carbon is done at $1100^{0} C$ Reason: $△$ $G^{0}$ is negative at this temperature thus, process is spontaneous.