1.

Which of the following statements in not correct regarding preparation of NaOH/

Answer»

NAOH is prepared by ELECTROLYSIS of sodium chloride in castner-kellner cell.
sodium metal DISCHARGED at cathode cmbines with mercury to form sodium amalgam,.
Chlorine is evolved at anode.
Amalgam is heated to separate Na and Hg.

Solution :Amalgam is TREATED with water to give sodium hydroxide and hydrogen gas. ltbr. 2Na-amalgam`+2H_(2)Oto2NaOH+2Hg+H_(2)`


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