Question

Identify the type of reactions:- (a) 4Na + O2 2Na2O

(b) Cu + 2AgNO3 Cu (NO3) + 2Ag

(c) FeSO4 Fe2O3 + SO2 + SO3

Answer 1

Answer:

For a: The reaction is synthesis reaction.

For b: The reaction is single displacement reaction.

For c: The reaction is decomposition reaction.

Explanation:

• For a:

The given chemical reaction is:

$4Na+O_2\rightarrow 2Na_2O$

The above reaction is considered as synthesis reaction because here, the substances are combining in their elemental state to form a single compound. Sodium and oxygen are combining in their elemental state to produce sodium oxide molecule.

• For b:

The given chemical reaction is:

$Cu+2AgNO_3\rightarrow Cu(NO_3)_2+2Ag$

The above reaction is considered as single displacement reaction because here more reactive element (copper) is displacing a less reactive element (silver) from its chemical reaction.

• For c:

The given chemical reaction is:

$2FeSO_4\rightarrow Fe_2O_3+SO_2+SO_3$

The above reaction is considered as decomposition reaction because a single substance (Iron (III) oxide) is breaking down into two or more simpler substances.