There is no change in the colour of red litmus and blue litmus paper when introduced into an aqueous solution of sodium chloride. After passing direct current through the same solution, red litmus changes to blue colour. Which product is responsible for this changes? Mention any two uses of this product
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Sodium Hydroxide is responsible for changing the red litmus into blue colour.
When sodium chloride is electrolysed, hydrogen gas is formed at the negative electrode and chlorine gas is formed at the positive electrode along with formation of sodium hydroxide.
Explanation:
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