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)
Abhijeet Gaurav Best Answer
See Bond length is inversely proportional to Bond strength or Bond stability. Here Single bond between C & H is very strong as both have small atom radii & formation of bond with H is through 1s which is very strong bond. Now the double bond between C & C has more bond length because they are through outer 2p orbital electrons which are less shielded than 1s-2p than 2p-2p bond. Thus the bond being much stronger between C- H than C=C.