Q. 25.0( 3 Votes )

The reaction, 3MnO2(s) + 4Al(s) 3Mn(ℓ) + 2Al2O5(s) + Heat is

an example of:
A. Combination and exothermic reaction

B. Combination and endothermic reaction.

C. Displacement and exothermic reaction.

D. Displacement and endothermic reaction.

Answer :

In the given reaction,


3MnO2(s) + 4Al(s) 3Mn(ℓ) + 2Al2O5(s) + Heat


Aluminum being more reactive displaces the manganese metal and forms a new compound. Hence it is a displacement reaction.


The heat is also released along with the formation of products, hence it is an exothermic reaction.

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