Question

5g of ferrous sulphate crystals are heated in a dry boiling tube.
1.List any two observations
2.Name the type of chemical reaction taking place
3. Write the chemical equation for the reaction ​

Answer 1

1...

• we can observe few water droplets on the mouth of the test tube....
• smell of burning sulphur can be observed.....
• brown coloured iron oxide can be seen....

2....

• decomposition reaction...

3.....

• FeSO4.7H2O----> Fe2O3 +SO2 +7 H2O

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Answer 2

1.  Colour change from green to white and Smell of burning sulphur

2. The type of chemical reaction taking place is decomposition.

3. $2FeSO_4(s)\rightarrow Fe_2O_3(s)+SO_2(g)+SO_3(g)$

Explanation:

Ferrous sulphate undergoes decomposition, that is it breaks into two or more than two products on absorption of energy. Two gases are evolved namely sulphur dioxide  and sulphur trioxide  and a solid ferric oxide  which remains as such and is called as residue.

Decomposition reaction is a type of chemical reaction in which one reactant gives two or more than two products.

The chemical reaction of decomposition is given as:

$2FeSO_4(s)\rightarrow Fe_2O_3(s)+SO_2(g)+SO_3(g)$

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