Question

During local action in simple voltaic cell:

• A. tiny hydrogen bubbles collect at the copper plate
• B. a large number of local cells are formed
• C. a large number of local cells are formed at the copper plate
• D. all the above

Answer 1

The correct option is B

a large number of local cells are formed

1. When zinc reacts with sulphuric acid to form positively charged hydrogen ions, then these ions, instead of migrating toward the copper plate, migrate toward the impurities in the zinc plate.

2. This makes hundreds of local cells on the zinc plate and is known as local action.

3. These local cells reduce or stop the flow of hydrogen ions toward the copper plate.

Hence, option (B) is correct.