Pls explain the first point ?

At higher temperature molecule gains large amount of energy and shows rapid flips so that 1,3,5 dihedral interaction at axial becomes compensated by Equatorial hydrogen... Thats wh...

hope this will help you 🙏

do to rapid interconversions between chair and boat form, all the Axial and equatorial H become identical so this compound gives only 1NMR signal