Question

is Mg + O2 → MgO a combination reaction or exothermis reaction???

Answer 1

Combination reaction is a reaction where two or more substances combine to produce a single substance.
Exothermic means that energy is released from the reaction.

Your reaction is: \[2Mg+O_2→2MgO + Energy\]

So it is a combination reaction AND it's an exothermic reaction.
It's an exothermic combination reaction :)

Answer 2

oh it's both thank u soo much...

Answer 3

no problemo :P

Answer 4

i have another doubt... how come decpost of vegetable matter is an example of exothermic reaction???

Answer 5

*decompost

Answer 6

Decomposition is exothermic because the pile releases heat as the microbes in the pile release energy (heat) when they compost the matter.