Time management is very much important in IIT JAM. The eduncle test series for IIT JAM Mathematical Statistics helped me a lot in this portion. I am very thankful to the test series I bought from eduncle.
Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science) 
		 
			 
			 
			 
			 
			 
			 
			 
			 
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Ravi bhushan![best-answer]() 
			
Band gap is just the energy gap between the conduction and valence band as per band theory. It is used to explain the electrical conductivity of substances. Ionisation energy on the other hand is the energy required to transfer an electron from an atom to infinity. Both are entirely different.