Silver nanoparticles were produced by a chemical reduction process, wherein Ag + ions from AgNO3 were convertedto metallic Ag 0 utilising an appropriate reducing agent such as hydrazine. By acting as a stabilising and cappingagent, the synthesised hydrazine-based ligand maintained the stability of the nanoparticles and preventedagglomeration. The synthesis of 2-nitrohydrazide-capped silver nanoparticles (2-NHAgNPs) was carried out usingthe conventional method, while the synthesis of 4-nitrohydrazide-capped silver nanoparticles (4-NHAgNPs) wasperformed using the ultrasonic method. Silver nanoparticles were synthesised via a typical one-pot chemical reduction method. Comprehensive characterisation using UV-Visible Spectroscopy, Fourier TransformInfraredSpectroscopy, Transmission Electron Microscopy, Particle size distribution, and zeta potential confirmedthesuccessful formation of 2-NHAgNPs and 4-NHAgNPs. Furthermore, the 2-NHAgNPs and 4-NHAgNPs exhibit remarkable anticancer effects against the human Brest cancer cell line MCF-7, different dye degradation, varioussensing of metal ions and gram-positive and gram- negative antimicrobial activity.