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Assertion. Al is obtained by hightemperaturereductionof aluminawithcarbon. Reason. Aluminareactswith carbon to formaluminiumcarbidewhichdecomposesat hightemperaturetofrom Al whilecarbonis oxidisedto CO.

Answer»

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

Solution :Correctassertion. Al isextractedbyhigh temperatureelectrolyticreductionof` Al _2 O _3 `towhichfluorsparandcryolitehavebeen ADDED.
Correct reason.` Al_ 2 O_ 3 `reactswith C at HIGH TEMPERATURES to form` Al_4C_ 3`whichdoesnot decompose.


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