While making steel, ______ is added to moulded pig iron to strengthen it.
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → Manganese
Note: This question is taken from the pre-rationalised NCERT book. The latest edition (2026-27) does not have this part. An extract of the pre-rationalised NCERT book is given below for the benefit of students.
Pre-rationalised NCERT: “Iron and Steel Industry … Iron is extracted from iron ore by smelting in a blast furnace with carbon (coke) and limestone. The molten iron is cooled and moulded to form pig iron which is used for converting into steel by adding strengthening materials like manganese.” |