Question

In rate equations can an order of reaction be negative?

Answer 1

i don't think so,the order cant be <0

Answer 2

@telijahmed is correct. you can have a zero-order reaction, but not negative.

Answer 3

Orders can be negative, actually. Not often, but it happens that an increased concentration of reactant acts as an inhibitor to a reaction, so the order is expressed as [X]^-1