What is the oxidation number for oxygen and chlorine in OCl^-

The oxidation number for oxygen in OCl^- is -2.

To find the oxidation number of chlorine (Cl), we can set up the equation:

(x) + (-2) = -1

Solving for x, we get:
x = -1 + 2
x = +1

Therefore, the oxidation number for oxygen in OCl^- is -2 and for chlorine is +1.