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 H 2 gas which helps in floating
(C) Mg reacts with dil. HCl to produce N 2 gas which helps in floating
(D) Mg reacts with dil. HCl to produce CO 2 gas which helps in floating
Answer -
Reactive Metals react with acid to form Hydrogen gas.
Now, reactive metals is decided on the basis of reactivity series
Since
- Zn, Fe and Cu are less reactive, they do not react with acid
- Also, Mg is more reactive, so it reacts with HCl to form Hydrogen gas , which helps in floating
So, the correct answer is (b)
