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Question

The purest form of iron is


A

Pig iron

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B

Wrought iron

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C

Cast iron

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D

Steel

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Solution

The correct option is B

Wrought iron


The explanation for correct answer:-

Option: (B)

  • Wrought iron is the purest form of iron and has the maximum iron percentage and least impurities.
  • It contains 0.12 to 0.25% carbon.
  • Wrought iron is prepared from cast iron by heating in a blast furnace.
  • Wrought iron is used in making metal gates, iron railings, iron bars, candle holders, etc.

Explanation of incorrect answer:-

Option: (A)

  • Pig iron has a higher carbon percentage and other impurities such as silica.
  • The carbon percentage in pig iron is 3.8-4.7%.
  • Pig iron has very less used because of the high carbon percentage which makes them extremely brittle.

Option: (C)

  • Cast iron has an intermediate carbon percentage that ranges between the carbo percentage of wrought iron and pig iron.
  • The carbon percentage in cast iron is 3.0-3.7%.

Option: (D)

  • Steel is an alloy that has Iron, Carbon, Chromium, Nickel, Molybdenum, Copper, Cobalt, and Manganese.
  • All these elements are present in different proportions.
  • Steel is used in the formation of utensils, lab equipment, and parts of vehicles.

Thus, the correct answer is option B: wrought iron.


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