1.

In the commercial electrochemical process for aluminium extraction, the electrolyte used isA. an aqueous solution of `Al_(2)(SO_(4))_(3)`B. an aqueous solution of `Al(OH)_(3)` and `NaOH`C. a molten mixture of `Al(OH)_(3) and CaCO_(3)`D. a molten mixture of `Al_(2)O_(3) and Na_(3)AlF_(6)`

Answer» Correct Answer - D
Impurity in solid decreases melting point .


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