Question

when cu is added to dil. hcl bubble formation is not seen and the temperature also remains unchanged. give reason ​

Answer 1

Answer:

Cu is less reactive...

Explanation:

bro this is because cu is placed below H in activity series so it does not react with HCl......

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Answer 2

Cu being less reactive doesn't react with the HCl to liberate Hydrogen gas and hence there is no bubble formation and the temperature also remains unchanged.

The formation of bubbles (Hydrogen gas) when a metal react with acid is related to the reactivity of the metal.

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