The excitation functions of \(^{nat}\) Mo( \(\alpha\) , x) \(^{97}\) Ru and \(^{nat}\) Mo( \(\alpha\) , x) \(^{103}\) Ru reactions in the energy range of 10–22 MeV are determined using the stacked foil activation technique and offline \(\gamma\) -ray spectrometry. The correction for \(\gamma\) -self attenuation is performed in the present measurement. The theoretical predictions of cross-section for \(^{nat}\) Mo( \(\alpha\) , x) \(^{97}\) Ru and \(^{nat}\) Mo( \(\alpha\) , x) \(^{103}\) Ru reactions are calculated by TALYS. The results of the experiment are compared with the existing cross-section data available in the EXFOR database and different level density models by TALYS code. The uncertainty propagation in the measured cross-sections and correlation matrix using covariance analysis has been studied in this work.