as concentration decreases half life decreases (Correct statement) (B) If order w.r.t. that reactant is zero then it will not affect rate of reaction. (Correct statement) (C) Order can be fractional but molecularity can not be (Incorrect statement) (D) For zero order reaction unit is mol L−1−1 and for second order reaction unit is mol−1Ls−1 (Correct statement)