there is no change in the colour of red litmus and blue Litmus Paper when introduced into an equation solution of sodium chloride after passing direct current through the same solution red litmus changes to blue colour which product is responsible for this change
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=>Sodium chloride is a Neutral substance with pH of 7 so it doesnot change colour of litmus paper.
=>But when electricity passes through i.e. electrolysis NaCl then Cl get formed in the anode and NaOH get left as residue.
=> Sodium Hydroxide is Basic in nature which turns the red litmus paper to blue.
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