Chapter 6: Problem 20

In which of the following the principle of "chemical effects of electricity" is not used? (1) Telephone (2) Purification of metals (3) Electroplating (4) Electro typing

Short Answer

Expert verified

Answer: Telephone

Step by step solution

Understand the principle of "chemical effects of electricity"

The principle of "chemical effects of electricity" refers to the process in which electrical energy causes chemical reactions to occur. This is commonly seen in processes like electrolysis, where electricity is used to decompose a substance into its elements or simpler compounds.

Analyze Option 1 – Telephone

Telephone works on the principle of converting sound waves into electrical signals, which are then transmitted through wires to the receiver and converted back into sound waves. This process does not involve any chemical reactions caused by electricity. So let's move to the next option.

Analyze Option 2 – Purification of metals

Purification of metals, such as copper, is done through electrolytic refining. In this process, the impure metal is made the anode, and a strip of pure metal is made the cathode. When an electric current is passed through the solution, the metal ions from the impure anode migrate towards the cathode and are deposited there in their pure form. This involves the chemical effects of electricity.

Analyze Option 3 – Electroplating

Electroplating is a process in which a layer of one metal is deposited onto the surface of another metal, usually for aesthetic purposes or to prevent corrosion. This process involves passing an electric current through a solution containing ions of the metal to be plated, causing the metal ions to deposit on the surface of the object. This process also involves the chemical effects of electricity.

Analyze Option 4 – Electrotyping

Electrotyping is a process similar to electroplating, where a layer of metal is deposited onto a mold or model to create a replica. Like electroplating, this process involves passing an electric current through a solution containing the metal ions, causing the ions to deposit on the mold and form the desired replica. This process also involves the chemical effects of electricity.

Identify the option that does not use the principle of "chemical effects of electricity"

Based on the analysis of all four options, it is clear that Option 1, Telephone, is the only option that does not involve the principle of "chemical effects of electricity." The other three options, Purification of metals, Electroplating, and Electrotyping, all involve chemical reactions caused by electricity. Therefore, the correct answer is Option 1: Telephone.

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In which of the following the principle of "chemical effects of electricity" is not used? (1) Telephone (2) Purification of metals (3) Electroplating (4) Electro typing

Short Answer

Step by step solution

Understand the principle of "chemical effects of electricity"

Analyze Option 1 – Telephone

Analyze Option 2 – Purification of metals

Analyze Option 3 – Electroplating

Analyze Option 4 – Electrotyping

Identify the option that does not use the principle of "chemical effects of electricity"

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