Question

when Q, the reaction quotient, is equal to 0, is there only reactant or only product?

Answer 1

let's consider an equation

a +b gives c+d

thus q=(c)(d)/(a)(b)

so if denominater/reactant is zero then q=infinity (simple maths rule)

so we see that q=0 can only be attained if numerator / products become zero.

So the only thing left will be reactant.

Explanation:

hope u understood