Alarge piece of iron was reacted with an acid. what would happen to the rate of the reaction had the large piece been finely divided into smaller pieces?

The reaction occurs in a similar way as magnesium does, but much less vigorous. Strong heating is required to make iron powder burn in oxygen. The reaction gives out a yellow showery sparks and produces a black solid. iron reacts with dilute hydrocloric acid to give iron chloride and hydrogen gas.

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