Question

The purest form of iron is

• A. Pig iron
• B. Wrought iron
• C. Cast iron
• D. Steel

Answer 1

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.