Question

Why do we use meta para ortho in physical chemistry?

Answer 1

The terms ortho-, meta-, and para- are used in chemistry to indicate the position of non-hydrogen substituents on a hydrocarbon ring (benzene derivative).
Ortho- describes a molecule with substituents at 1 and 2 positions on an aromatic compound. In other words, the substituent is adjacent or next to the primary carbon on the ring.The symbol for ortho- is o- or 1,2-
Meta- is used to describe a molecule with substituents are at the 1 and 3 positions on an aromatic compound.The symbol for meta- is m- or 1,3
Para- describes a molecule with substituents at the 1 and 4 positions on an aromatic compound. In other words, the substituent is directly opposite the primary carbon of the ring.The symbol for para- is p- or 1,4-