  In this work, we focus on the collapse of a spherically symmetric
perturbation, with a classical top-hat profile, to study the nonlinear
evolution of only viscous modified Chaplygin gas (VMCG) perturbations in
Einstein's gravity as well as in loop quantum Cosmology (LQC). In the perturbed
region, we have investigated the natures of equation of state parameter, square
speed of sound and another perturbed quantities. The results have been analyzed
by numerical and graphical investigations.
