Slove 18 plz 18. In the presence of acid, the initial concentration of cane-sugar was reduced from 0.2 M to 0.1 M in 5 hrs and to 0.05 M in 10 hrs. The reaction must be of (a) zero order (b) first order (c) second order (d) fractional order Share with your friends Share 0 Vandana answered this Dear student.. 1 View Full Answer