Which of the following procedures is suitable for identifying the food colouring added to a pastry sample?

By: |Published on: May 13|Categories: Chemistry WAEC| 0 comments

A. The cathode becomes coated with copper
B. Both electrodes gain electrons
C. The blue colour of the solution fades gradually
D. The anode increases in mass

Correct Answer: Option A

A. The cathode becomes coated with copper

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