AP EAMCET Medical 24 Apr 2019 Shift 1 Paper

Identify the conect statements from the following
I) Chemical Oxygen Demand (COD) of water is determined by oxidising organic substances with acidified K2Cr2O7
II) High concentration of CO, leads to stiffness of flower buds
III) NO2 , is a lung irritant
IV) Photochemical smog is also called reducing smog.