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Q.

The electrolyte in Hall-Heroult process is a mixture of X, Y and Z. ‘X’ is not a fluoro compound.Correct statement regarding X, Y and Z is

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a

‘X’ is a bad conductor of electricity

b

‘Y’ and ‘Z’ are highly soluble in water

c

‘Y’ and ‘Z’ are added to decrease the conductivity and increase the melting temperature

d

‘X’, ‘Y’ and ‘Z’ are Aluminium compounds

answer is A.

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Detailed Solution

X=Al2O3;Y,Z=CaF2,Na3AlF6;‘Y’ and ‘Z’ are added to increase the conductivity and decrease the melting temperature;‘Y’ and ‘Z’ are sparingly soluble in water;‘X’ is a bad conductor of electricity
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