A. introducing an oxidizing agent into the acid
B. not drawing current continuously for long periods
C. amalgamating the surface of the zinc plate
D. using a porous pot to isolate the zinc plate from the acid
E. using dilute sulphuric acid
Correct Answer:
Option C – amalgamating the surface of the zinc plate
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![How long will it take to heat 3kg of water from 28°C to 88°C in an electric kettle taking 6A from a 220V supply? [specific heat capacity of water = 4180 J kg-1K-1]](https://erudites.ng/wp-content/plugins/contextual-related-posts/default.png "How long will it take to heat 3kg of water from 28°C to 88°C in an electric kettle taking 6A from a 220V supply? [specific heat capacity of water = 4180 J kg-1K-1]")