Which of the following are physical parameters to decide water quality?

The physical water-quality parameters here are temperature, total suspended solids and conductivity.

Statement 1, pH, is a chemical parameter measuring hydrogen-ion activity, not a physical one.

Statement 2, temperature, is a physical parameter affecting solubility and aquatic life.

Statement 3, total suspended solids, is a physical measure of undissolved particles.

Statement 4, hardness, is a chemical parameter reflecting calcium and magnesium salts.

Statement 5, conductivity, is a physical measure of dissolved-ion content.

Physical, chemical and biological parameters together define overall water quality.