Question

In a test tube A and B mixture of iron and sulphur is taken.Test tube A is heated and test tube B isn't heated.Now,Dilute hydrochloric acid is added in both the test tubes.Write the name of gases produced in each of the test tube and write the identification process for each of them.​

Answer 1

Answer:

When iron and sulphur is heated iron sulphide is formed

Fes

Now when HCL is added to Fes we get the following:

2HCL+Fes= H2S+FeCl2

Here we get Hydrogen sulphide gas.

You know, it smells like rotten egg

Oho, I got the answer!

Here, when we mix iron and sulphur, no reaction takes place without heating. Means when HCL is added to the test tube which is not heated,it reacts with the iron to produce Hydrogen gas:

2Hcl+Fe=Fecl2 + H2

Here Hydrogen is produced

Conclusion :two gases produced are hydrogen and hydrogen sulphide

Identification process :

When we bring a burning candle near the mouth of the test tube, if it burns with a pop sound, then it is hydrogen.

Answer 2

A will remain as a mixture .
B will have Iron sulphide in it .
These are before adding HCl in it.
In B a chemical reaction takes place.
FeS + 2HCl = H2S + FeCl2