Ablacksmith melts and shapes a block of iron into a blade. she then sets the blade, whose edges are molten, outside, where it is raining slightly. the blade's outer edges both solidify and then rust. which of the following has happened to the iron throughout the day? a. the iron has undergone a physical change only. b. the iron has undergone a chemical change only. c. the iron has undergone both a physical and chemical change. d. the iron has not undergone any changes.

The correct answer is option c.

Explanation:

A physical change is defined as  a change in shape, size takes place. No new substance gets formed in these reactions.

Solid iron block → liquid iron

Liquid iron → solid blade shaped iron

Here, iron in first melted and then set into a shape of blade. Hence, physical change.

A chemical change is defined as a change in chemical composition takes place. A new substance is formed in these reactions.

Here, rusting of iron is chemical change:

Throughout the entire process blacksmith has changed the iron block physically by changing its size and shape. And due to action of raining in the edges of the blade rusting of an iron also took place which was a chemical change.

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