gas is released when iron filings react with hydrochloric acid.

Hydrogen

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Oxygen

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Chlorine

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Solution

The correct option is A Hydrogen
Iron on reaction with hydrochloric acid, replaces the hydrogen from the acid and forms ferrous chloride. Hydrogen gas is evolved during the reaction in the form of bubbles. ${Fe}_{(s)} + 2 {HCl}_{(aq)} \to {FeCl}_{2}_{(aq)} + H_{2}_{(g)}$

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Q. What happens when dilute hydrochloric acid is added to iron filings?

gas is released when iron filings react with hydrochloric acid.

The correct option is A HydrogenIron on reaction with hydrochloric acid, replaces the hydrogen from the acid and forms ferrous chloride. Hydrogen gas is evolved during the reaction in the form of bubbles. Fe (s) + 2HCl (aq) → FeCl2 (aq) +H2 (g)

The correct option is A Hydrogen
Iron on reaction with hydrochloric acid, replaces the hydrogen from the acid and forms ferrous chloride. Hydrogen gas is evolved during the reaction in the form of bubbles. ${Fe}_{(s)} + 2 {HCl}_{(aq)} \to {FeCl}_{2}_{(aq)} + H_{2}_{(g)}$