Question

Iron block undergoes number of changes before it becomes a sword. What is the correct sequence of changes involved?

• A. Cooling $\to$ Softening $\to$ Melting $\to$ Placing in mould $\to$ Heating
• B. Heating $\to$ Softening $\to$ Melting $\to$ Placing in mould $\to$ Cooling
• C. Softening $\to$ Cooling $\to$ Melting $\to$ Placing in mould $\to$ Heating
• D. Melting $\to$ Cooling $\to$ Heating $\to$ Placing in mould $\to$ Softening

Answer 1

The correct option is B Heating $\to$ Softening $\to$ Melting $\to$ Placing in mould $\to$ Cooling

To make a sword or a spade, iron is first heated for a long time. It starts turning soft and gradually starts melting. The molten iron is then placed in a mould to give a definite shape. On cooling it settles in that shape and later taken out.