Statement-1:In the electrolytic reduction of `Al_(2)O_(3)`, cryolite lowes the melting point of the mixture and bring conductivity: Statement-2: Cryol

Question

Statement-1:In the electrolytic reduction of `Al_(2)O_(3)`, cryolite lowes the melting point of the mixture and bring conductivity: Statement-2: Cryol

Statement-1:In the electrolytic reduction of `Al_(2)O_(3)`, cryolite lowes the melting point of the mixture and bring conductivity:
Statement-2: Cryolite is an ore of aluminium.
A. Statement-1 is True, Statement-2 is True, Statement-2 is a correct explantion for Statement-1.
B. Statement-1 is True, Statement-2 is True, Statement-2 is not a correct explantion for Statement-1.
C. Statement-1 is True, Statement-2 is False.
D. Statement-1 is True, Statement-2 is True.

Monjur Alahi

4 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Correct Answer - B
Statement-1: Cyrolite as impurity reduces the melting point of `Al_(2)O_(3)` from 2200K to approximately 930K and being ionic compound dissociates to give ions which bring about the conductivity of the electrolyte.
Statement-2: Cryolite is `Na_(2)AlF_(4)` and is ore of aluminium. Therefore, (b) is correct.