For MP Excise Constable exam the important topics for the science are Physics(unit and measurement , viscosity , surface tension , light , motion , electricity , scalar & vector quantity , elasticity ) Chemistry (acid and base and salt , carbon and its compound , alloys , leaching process , single bond , triple bond , litmus paper , PH meter , olfactory indicator , dibasic acid , fuel , gaseous fuel , secondary fuel , Biogas , lichen ,butanol , chemical bond , covalent bond , ionic bond , van der wall force , periodic table property , electronegativity , ionization energy , lattice energy , dipole moment , oxidation and reduction , oxidizing and reducing agent , acid rain soap , coal type , molecular orbital theory , ,overlapping , Ozone layer )Biology (scientist Haldane , Priestly , Oparin , Cell and Cell organelle , animal classification , cellular level of organization , eukaryotic cell, prokaryotic cell , Lamarckism , Darwin theory , adaption of species , brain ,neurons , plant classification , human disease , plant disease , plant hormones ,digestive system , photosynthesis , ATP, primary productivity , DNA , RNA , Gene , salivary gland , Homologous organ , vestigial organ , arrangement in floral axis , Whitaker classification , Down syndrome , founder effect , cell , cell division , hardy Weinberg law , mendelian disorder , mutation in gene , immune system ) Environment (food chain , wildlife protection act , rain in desert , biodiversity measuring technique , canopy layer , mesosphere, ecosystem , ecotone, pollution air, water soil , national park types , biomes , biotic and abiotic component of ecosystem , pond ecosystem zone , deodar tree found , sal tree found , alpine tree found , man made ecosystem , pyramid of ecosystem )