Question

Metal is produced as waste in industries like _____.

• A. Skiing
• B. Digging
• C. Mining
• D. Electroplating

Answer 1

The correct option is D

Electroplating

Explanation for Correct answer:

Option D Electroplating

• Electroplating is a process that can produce a metal layer on a solid substrate through the cation reduction of that metal by passing an electric current.
• This process is used in industries for promoting the texture of objects, such as appearance, electrical conductivity, corrosion, reflectivity, etc
• Electroplating is widely used in various industries for coating metal objects with a thin layer of a different metal.
• The layer of metal deposited will have some desired properties, which the metal of the object lacks.
• Electroplating has wide usage in industries, it can also be used in making inexpensive jewelry.
• The metals used are costly metals having superior qualities like Nickel, Platinum, Silver, Gold, etc.
• In the total amount of these metals utilized in electroplating, $4\%$ goes as waste in sludge spent wash, electroplating solutions, etc.
• Hence option (D) Electroplating is correct.

Explanation for incorrect answer:

Option (A) Skiing

• Skiing is the use of skis to glide on snow.
• The first layer of wax is applied to the bottom of a ski which is similar to the paraffin wax that is used in candles.
• Wax forms a bond with the bottom of the ski to keep out dirt and water.
• The next layer contains fluorocarbons which are made from a mix of Fluorine, Hydrogen, and Carbon.
• The wax ingredients are designed for speed and cut friction between the ski and the surface of the snow.
• Hence option A Skiing is incorrect

Option (B) Digging

• The process of using claws, hands, or tools, to remove material from a solid surface, mainly soil or sand from the surface of the Earth is known as Digging.
• Hence option B Digging is incorrect.

Option (C) Mining

• The process of extracting useful materials from the earth is known as Mining.
• Hence option C Mining is incorrect.