Hey Piyush,

There is no as such question bank available on the internet for MSC. Physics entrance. Although, you can refer to the following books for the preparation-

• Physics of Atoms and Molecules (B.H. Brandsen)
  
• Mechanics (D.S. Mathur)
  
• Atomic and Molecular Physics (Raj Kumar)
  
• Post graduate Entrance Examination(Arihant Publishers)
  
• Introduction to Atomic Spectra (Harvey Elliotte White)
  

All the best!