Ineed . i’m between b or c and many responses have been b but i think that’s for if no would be added and not idk i’m confused

C.) More NO₂ and SO₂ would form

Explanation:

Equilibrium:

This is the state of reaction in which the rate of forward reaction and reverse reaction are same.

There are three factors that effect the equilibrium condition.

The change in concentration

The change in volume

The change in temperature

In given equilibrium reaction,

SO₂ + NO₂  ⇄  NO + SO₃ + heat

when SO₃ is added it means more amount of product is on right side and equilibrium is disturb. Thus equilibrium is shifted toward the left produced more SO₂ and NO₂ and regain the equilibrium.