Please tell me correct answer
Dear student,
There is a temperature change and release of hydrogen gas observed in first and second test tube which means, metals present in first and second test tube are more reactive metals than hydrogen and these metals are present above the hydrogen in the reactivity series.
In the third test tube that metal is present below to the hydrogen in the reactivity series and due to this reason it will not able to displace hydrogen from hydrochloric and and no reaction takes place.
Mercury is present below to hydrogen which means metals which are able to displace hydrogen will also able to displace mercury from mercurous chloride solution.
Hence, the correct option is (B).
Regards
There is a temperature change and release of hydrogen gas observed in first and second test tube which means, metals present in first and second test tube are more reactive metals than hydrogen and these metals are present above the hydrogen in the reactivity series.
In the third test tube that metal is present below to the hydrogen in the reactivity series and due to this reason it will not able to displace hydrogen from hydrochloric and and no reaction takes place.
Mercury is present below to hydrogen which means metals which are able to displace hydrogen will also able to displace mercury from mercurous chloride solution.
Hence, the correct option is (B).
Regards