During the electrolysis of copper II sulphate between platinum electrodes, if litmus solution is added to the anode compartment
the litmus turns blue but no gas is evolved
the litmus turns blue and oxygen is evolved
the litmus turns blue and hydrogen is evolved
the litmus turns red and oxygen is evolved
Explanation
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Discussions (6)
please my school, the answer isn't correct
since OH' migrate to the anode, and generally OH known as hydroxyl is a base and it is discharged, there for the litmus paper turn blue at the anode and oxygen gas is evolved
pls work on this.
Actually, as OH- gets discharged at the anode, it forms water and oxygen gas. The water(H20) then dissociates again into OH- and H+. More of the OH- gets discharged which leaves and excess of H+ gas, making the anode acidic. I hope this helps.
this explanation you're given is too critical, so not to confuse people, the correct 
answer is B please make the correction
