Medium
During the extraction of sodium metal by electrolysis,a mixture of $40\% \ NaCl$ and $60\% \ CaCl_2$ is used because...
- AIt helps in conducting electricity.
- BThe melting point of this mixture is lower than the melting point of $NaCl$.
- C$Ca^{2+}$ ions displace $Na^+$ ions.
- D$Ca^{2+}$ ions reduce to $Na$.
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Given below are two statements: one is labelled as Assertion $(A)$ and the other is labelled as Reason $(R).$
Assertion $(A):$ Aluminium is extracted from bauxite by the electrolysis of a molten mixture of $Al_2O_3$ with cryolite.
Reason $(R):$ The oxidation state of $Al$ in cryolite is $+3$.
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