In the electrolytic extraction of aluminium, the substance added to reduce the melting point of alumina is .

cryolite

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flourspar

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graphite

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Solution

The correct option is A cryolite
In the electrolytic extraction of aluminium, cryolite $(N a_{3} A l F_{6})$ is used for the reduction of melting point and fluorspar $(C a F_{2})$ is used for increasing the conductivity of the solution. Inert graphite is the electrode used in the electrometallurgical (reduction) process.

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