Question

What is conformer and types of conformer

Answer 1

Any two arrangements of atoms in a molecule that differ by rotation about single bonds can be referred to as different conformations,conformations that correspond to local minima on the energy surface are specifically called conformational isomers or conformers.

There are many types total is in the pic.
we use three important terms as,
1- Staggered
2- Eclipsed
3- Gauche.

The dihedral angle is the main naming requirement.

For more details follow NCERT as all can not be narrated here.

Thanks.
Tripathy.