Answer:
When electricity is passed through a concentrated solution of sodium chloride (called brine), it decomposes to form sodium hydroxide, chlorine and hydrogen gas. \[2NaCl(aq)+2{{H}_{2}}O\xrightarrow{Electricity}2NaOH(aq)+C{{l}_{2}}\uparrow +{{H}_{2}}\uparrow \] (i) Use of Sodium hydroxide (NaOH). It is used for making soaps and detergents. (ii) Use of Chlorine \[\mathbf{(C}{{\mathbf{l}}_{\mathbf{2}}}\mathbf{)}\]). It is used in the production of bleaching powder. (iii) Use of hydrogen gas \[\mathbf{(}{{\mathbf{H}}_{\mathbf{2}}}\mathbf{)}\]. It is used to make ammonia for fertilisers; used as a fuel or margarine.
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