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Reaction of Acids with Metals

What is the n...

Question

What is the nature of the following reaction?
$C u + H C l \to$

Reacts vigorously

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No reaction

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Reacts modestly

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Reacts slowly

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Solution

The correct option is B No reaction
Hydrochloric acid ( $H C l$ ) does not react with copper ( $C u$ ).
Only those metals which lie above hydrogen in the reactivity series react with acids like $H C l$ and dilute $H_{2} S O_{4}$ and displace hydrogen from them.

Copper lies below hydrogen in the reactivity series and does not react with hydrochloric acid.
So, the correct answer is $B$ .

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B C l_{3} + H_{2} 450^{o} C - --- \to C u - A l X + H C l

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