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The diagram shows the reaction between m...

The diagram shows the reaction between metal and dil. acid.

What is the reason for different behaviour of Mg in test tube B?

A

Mg is lighter element than dil. HCl

B

Mg reacts with dil. HCl to produce `H2` gas which helps in floating

C

Mg reacts with dil. HCl to produce `N2` gas which helps in floating

D

Mg reacts with dil. HCl to produce `CO2` gas which helps in floating

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