Question

10.
Strong heating of ferrous sulphate leads to the formation of a brown solid
and two gases. This reaction can be categorised as
(A) displacement and redox.
(B) decomposition and redox.
(C) displacement and endothermic.
(D) decomposition and exothermic.
•
TOTT fa​

Answer 1

Answer:

The reaction is decomposition and endothermic reaction.

Answer 2

Answer:

This may be categorized as a decomposition and redox reaction. It is a thermal decomposition reaction because ferrous sulphate decomposes on passing of heat.

As for the “redox” part, it is a bit beyond the scope of the Class X syllabus.

This reaction involves the change in oxidation number of iron from +2 to +3 in FeSO4. Since the oxidation state changes from +2 to +3, there is increase in oxidation number and oxidation occurs. As the major product among the two gas is SO2, the oxidation state of S changes from +6 to +4, the oxidation number decreases, which is nothing but reduction. Thus, this decomposition reaction is also a redox reaction.

Explanation:

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