C-11-Q052mediumsingle_mcqC2H4+H2O→H3PO4?\mathrm{C_2H_4 + H_2O \xrightarrow{H_3PO_4} ?}C2H4+H2OH3PO4?aC2H5OH\mathrm{C_2H_5OH}C2H5OHbC2