MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Inorganic Chemistrys- Block 3.0Some Important Compounds of Sodium
Sodium chloride is prepared by the electrolysis of sodium chloride solution the electrodes used as cathode and anode are respectively.
A.Mercury and platinum
B.Platinum and Mercury
C.Mercury and carbon✓ Correct
D.Carbon and Mercury
Explanation
When brine solution is electrolyzed using a mercury cathode and carbon anode, sodium metal is discharged at cathode which combined with Hg to give sodium amalgam and chloride gas is evolved at anode. Sodium amalgam on hydrolysis produces sodium hydroxide.
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