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Q.

Which of the following is not an application of electrolysis?

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a

Electroplating

b

Electrotyping

c

Purification of metals

d

Radio-telegraphy

answer is D.

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Detailed Solution

Radio-telegraphy is not an application of electrolysis.
Except for Radio-Telegraphy, all others are applications of electrolysis. In electroplating, one metal is deposited on the other metal with the help of an electric current. In the purification of metals, an impure material is made pure with the help of an electric current. In electrotyping, the paper is printed with ink in the newspaper. But radio communication by means of Morse Code or other coded signals in radiotelegraphy. The radio carrier is modulated by changing its amplitude, frequency, or phase in accordance with the Morse dot-dash system or some other code.

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Which of the following is not an application of electrolysis?