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Q) Whcih process according to Nelson's or caster - Keller process, is betterfor producing NAOH; Explain tha processAns:Nelson's Process:- ( Perforated diaphragm Process)Principle: In this method NaOH is manufactured by the electrolysis of brine solution usingperforated steel U-tube as cathode and a graphite rod as anode.Na + + Cl - ( Ionization )NaClH 2OH + + OH - ( Ionization )2 H + + 2e - → H 2 ( at cathode )→2 H + + 2e - ?? H 2 ( at cathode ) ??? (Electrolysis)--2Cl ?? Cl2 + 2e ( at anode ) ?→?Na + + ?? NaOH→Process :Nelson's cel consists of a perforated steel U - tube lined inside with asbestos, which acts ascathode. Brine solution is taken into it. The whole apparatus is suspended in an iron tank, providedwith outlets (one for H 2 and the other for Cl2 ) The tank is provided with steam arrangement. Agraphite rod suspended in the brine solution acts as anode.The cathode and anode are connected by means of wires to the terminals of a battery and atthe same time steam is passed. Electrolysis takes place. NaOH collects into the the trough providedat the bottom
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