My brother had his interview at IIM Ranchi last year for IPM. His 10th marks were 95% and 12th (PCB) marks stood at 78.4%. His interview was scheduled for the afternoon. He was welcomed by 2 male panelists who seemed quite comfortable and asked him if he had had lunch before appearing for the interview. Then they asked him the following questions 

• 10/12th marks 
• Favorite subject (PS: I said biology.)
• Why did you choose IPM after having biology? How would these subjects complement you?
• What is the difference between gray and white matter? (Brain)
• What is the function of the vitreous humor, and where is it located?
• What are the different enzymes secreted by the pancreas?
• Name the smallest and largest bone in the human body. (Location as well)
• State the “Second law of thermodynamics.”
• Define E=mc^2
• CM of your state. Any current official statement made by him.
• What is your hobby? 

From the above list of questions, we can boldly say that the majority of the questions are aimed at testing your general knowledge. If you have a confident aura, you will easily win their favor.

Pro tip: You can direct the interview to a favorable topic by elaborating on any specific answer.