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Statement - 1 : Standard free energy ...

Statement - 1 : Standard free energy of formation ` (Delta _f G^(@)) ` for `Al_2O_3 and Cr_2O_ 3 ` at 1273 K are - 827 kJ `mol^(-1 )` of ` O _ 2 and - 540 kJ mol^(-1 ) ` of `O_2 ` respectively.
Statement - 2 : Al can reduce ` Cr_ 2 O _ 3 ` to Cr since, ` Delta _r G^(@) ` is negative.

A

Statement - 1 is True, Statement - 2 is True, Statement - 2 is correct explanation of Statement -1.

B

Statement - 1 is True , Statement - 2 is not a correct explanation of Statement - 1.

C

Statement - 1 is True, Statement - 2 is False.

D

Statement - 1 is False, Statement - 2 is True.

Text Solution

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The correct Answer is:
A
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Standard free energy of formation for Al_(2)O_(3) and Cr_(2)O_(3) at 1273 K are -827 kJ mol^(-1) (of O_(2)) and -540 kJ mol^(-1) (of O_(2)) , respectively. Al can reduce Cr_(2)O_(3) to Cr since, Delta_(r) G^(Ө) is negative.

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