Heyyy fam is this right choices 1.backward directions 2.frontward directions 3.back and front directions choices for .reach equilibruim 2.go to completion 3.lose its activitation energy

A reversible reaction is a reaction that takes place in back and front directions. If the reaction were to reach equilibrium, the rate of forward direction would be equal to that of the reverse reaction.

Explanation:

Reversible reactions :

These are the reaction in which reactants reacts to give product and products reacts to give reactants as a product in return.

i do not get it   at all

it should have an internal chamber and two thermometers sticking out of the top. the internal chamber will also be closed off from the outside.