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Question

Choose the correct option to complete the following reaction:

2Al (s)+6HCl (aq)


A
2AlH3 (aq)+3Cl2 (g)
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B
Al2O3 (aq)+3H2 (g)
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C

2Al(OH)3 (aq)+3Cl2 (g)

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D

2AlCl3 (aq)+3H2 (g)

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Solution

The correct option is D

2AlCl3 (aq)+3H2 (g)


Acids react with metals to form their respective metal salt and hydrogen gas. Aluminium (Al) is a reactive metal. It reacts with dilute hydrochloric acid (HCl) to form aluminium chloride (AlCl3) and hydrogen gas (H2). The reaction involved is:

2Al (s)+6HCl (aq)2AlCl3 (aq)+3H2 (g)


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