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The following are the statements regarding NaOH
i) It is prepared by Castner-Solvay process

ii) The cathode in the outer compartments in mercury cathode method is Hg

iii) The raw materials in Gossage method are milk of lime and Sodium carbonate

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only iii is correct

all are correct

ii and iii are correct

i and iii are correct

answer is A.

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Detailed Solution

i) from NaCl

ii) in middle compartment it is iron

iii) lime stone formation

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