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The present includes the synthesis of pyrazoline derivatives using chalcones and phenyl hydrazine in the presence of ethanol. It also reveals that 2-pyrazoline complexes are physiologically active and may be used in a variety of therapeutic functions. FT-IR, 1H-NMR, 13C-NMR, LC-MS, and elemental analyses were used to characterise newly synthesised phenyl-pyrazoline derivatives. The antimicrobial activity of the synthesised compounds was assessed using the agar well diffusion assay and the Minimum Inhibition Concentration (MIC). Compounds 4b, 4f, and 4h have exhibited remarkable antibiotic action against bacterial strains such as Staphylococcus aureus, Bacillus subtilis, Salmonella. Typhi, and Shigella sp. On the other hand, compound 4h had significant antifungal activity against Candida albicans and Aspergillus fusarium and was a highly promising agent when compared to standard nystatin.