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  • Which among the following shall not produce hydrogen on reaction with dil. HCl?Option: 1 Iron (Fe)  <div class='qna-option'

Which among the following shall not produce hydrogen on reaction with dil. HCl?

Option: 1

Iron (Fe)
 


Option: 2

Magnesium (Mg)
 


Option: 3

Sodium (Na)
 


Option: 4

Copper (Cu)


Answers (1)

best_answer

Metals at higher positions than hydrogen in electrochemical series can displace hydrogen gas on reaction with dilute HCl. Whereas the metals at a lower position than hydrogen shall not react with dil. HCl.

Reaction of Fe, Mg and Na with dilute HCl produces hydrogen.

\begin{aligned} & \mathrm{Fe}+\text { dil. } 2 \mathrm{HCl} \rightarrow \mathrm{FeCl}_2+\mathrm{H}_2 \\ & \mathrm{Mg}+\text { dil. } 2 \mathrm{HCl} \rightarrow \mathrm{MgCl}_2+\mathrm{H}_2 \\ & \mathrm{Na}+\text { dil. } 2 \mathrm{HCl} \rightarrow \mathrm{NaCl}_2+\mathrm{H}_2 \\ & \mathrm{Cu}+\text { dil. } 2 \mathrm{HCl} \rightarrow \text { No reaction } \end{aligned}

Posted by

Gautam harsolia

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