Core collapse supernovae, due to interaction of the shock wave with the circumstellar medium, show emission in the X-ray wavelengths. X-ray emission occurs in supernova due to a prompt thermal burst, compton scattered gamma rays synthesised by the radioactive nucleids or due to the interaction of the shock with the circumstellar medium. X-Ray emission occurs during two phases : one early and one late (> 100 days) in the evolution of supernova. SN 1978K is one of the X-ray rich supernova with long lasting X-ray emission in the recent times. We present the X-ray spectral analysis of SN 1978K. The spectrum is best fit with a "dual vnei" model having variable elemental abundances. Our analysis shows the presence of two temperature plasma - one with a higher temperature and other with a lower temperature . We will briefly describe Chevalier-Fransson model and justify our results with this.