Abstract A new series of compounds N-(4-(2-(3-(1 H-benzo [d] imidazol-2-yl)-5-(aryl)-4, 5- dihydro-1 H-pyrazol-1-yl)-2-oxoethoxy) phenyl) acetamides (5a–u) were synthesized and structures of these compounds were elucidated by spectral (IR, 1 H NMR, 13 C NMR, and mass spectra) analysis. Antimicrobial activity was measured against Escherichia coli (MTCC 443), Pseudomonas aeruginosa (MTCC 1688), Staphylococcus aureus (MTCC 96), ...