yes this is the expected order............. H3SO4 is the strongest acid so it have the maximum ability to donate H or to release H+ which react with Zn and make Hydrogen gas......... CH3COOH is the weakest acid so it have very less tendency to release H+ so less H+ so less rate of reaction with Zn the order of reaction with ZN will be same as the order of acidity of acids because the the reaction with Zn give hydrogen gas......so the more H+ an Acid can give more will be its order.............. Solution yes this is the expected order............. H3SO4 is the strongest acid so it have the maximum ability to donate H or to release H+ which react with Zn and make Hydrogen gas......... CH3COOH is the weakest acid so it have very less tendency to release H+ so less H+ so less rate of reaction with Zn the order of reaction with ZN will be same as the order of acidity of acids because the the reaction with Zn give hydrogen gas......so the more H+ an Acid can give more will be its order...............