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Question

gas is released when iron filings react with hydrochloric acid.

A
Oxygen
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B
Chlorine
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C
Hydrogen
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Solution

The correct option is C 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) + 2HCl (aq) FeCl2 (aq) +H2 (g)

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