Question

What are the conformations? explain 2 conformations of ethane?

Answer 1

The infinite no. of momentary arrangements of the atoms in space which result through rotation about a single bond are called conformation.
the two conformation of ethane are
i) staggered
ii) eclipsed
hope it helps

Answer 2

Conformation: The phenomenon of different spatial arrangements (three dimensional arrangement in space) of atoms that can be converted into one another by free rotation of atoms about C-C single bonds is called conformation and the compounds are called l conformers or rotamers.

These conformational isomers interconvert rapidly and cannot be isolated easily.