Is it true that when dilute hydrochloric acid is added to iron filings, hydrogen gas and iron (II) are produced?

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answer is A.

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Detailed Solution

The above statement is true.
When dilute hydrochloric acid is added to iron filings, hydrogen gas and iron(II) are produced.
A single replacement reaction is also known as a single displacement reaction, and it is a reaction in which one element is substituted to another element in a compound. The starting materials are always pure elements, such as hydrogen gas, plus an aqueous compound. When a dilute hydrochloric acid is added to iron filings, iron(II) chloride & H2 gas are produced. In this reaction, iron displaces H2 from hydrochloric acid to form iron chloride and H2 gas. This reaction is an example of a single displacement reaction.

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