1.

Assertion. Thereductionof a metaloxideis easierifthe metalformedisin the liquidstate. Reason.Delta _f G^(@)of metaloxides increaseswithtemperature.

Answer»

Ifbothassertionandreasonaretrue, andreason is NOTTHE trueexplanationofthe assertion.
Ifbothassertionandreasonaretrue,butreasonis notthetrueexplanationoftheassertion.
Ifassertionis true,butreason isfalse
If bothassertionandreasonarefalse

SOLUTION :Correctexplanation.Since entropy change` (Delta S ) ` ofthereductionprocessismore+ vewhenthemetal isin theliquid stateandtheoxidebeingreduced isinthesolidstate. Sincethe VALUEOF` T Delta S ` increasesandthatof` DELTAH`remainsconstant,therefore, the value` Delta_ rG^(@) `(Delta G =H- TDelta S ) `becomesmore- veandhencethereductionbecomeseasier.


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