During the electrolysis of copper II sulphate between pla...
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
the litmus turns red and then becomes colourless
Correct answer is D
Cu+ is discharged preferentially at the cathode
OH− is discharged preferentially at the anode
The presence of SO42− and H+ makes the medium acidic
Which makes the litmus turns red and oxygen is evolved
Which of the following CANNOT be obtained by fractional distillation of petroleum? ...
Find the number of neutrons in an atom represented by 4521X....
The removal of rust from iron by treatment with tetraoxosulphate (IV) acid is based on the? ...
Which of the following can undergo both addition reactions and substitution reactions? ...
In the laboratory preparation of oxygen, dried oxygen is usually collected over ...