Choose the correct answers to the questions from the given options. An aqueous solution of copper sulphate turns colourless on electrolysis. Which of the following could be the electrodes? P. anode: copper; cathode: copper Q. anode: platinum; cathode: copper R. anode: copper; cathode: platinum (ii) A compound P is heated in a test tube with sodium hydroxide solution. A red litmus paper held at the mouth of the test tube turns blue.
Explanation
The aqueous solution of copper sulphate turns colourless on electrolysis because copper is deposited at both the anode and cathode, thus reducing the concentration of copper ions in the solution.
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