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Grade: 10

                        

ZINC granules are added to the dilute sulphuric acid.what do you observe on the surface of the zinc granules ?

3 years ago

Answers : (2)

Arun
24742 Points
							
H2SO4 + Zn ---> ZnSO4 + H2

Observations- 1) When dilute sulphuric acid is poured on zinc granules, then zinc sulphate is formed along with the evolution of a gas. Zinc is more reactive than hydrogen, so displaced it from sulphuric acid. 
2) The gas evolved is hydrogen. We can test its presence by bringing a burning candle near the mouth of the test tube and hearing for a popping sound. Only hydrogen gas burns with a 'pop' sound.
3 years ago
Akachdeep Medhi
89 Points
							
When Zn granules are added to dil. H2SO4 then the following reaction takes place:
Zn(s) + H2SO4(aq) = ZnSO4(aq) + H2(g)
During the reaction we would observe effervescence in the surface of the container.This indicates that hydrogen gas has evolved.And we can test whether it is hydrogen gas or not by bringing a lighted matchstick.It will burn with a pop sound.
 
With regards Akash
2 years ago
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