Chemistry The most abundant element by number in the living system is : Hydrogen Oxygen Nitrogen Carbon Hydrogen Oxygen Nitrogen Carbon ANSWER DOWNLOAD EXAMIANS APP
Chemistry Nucleons are regarded as composites sub-particles known as Quarks Leptons Mesons Photons Quarks Leptons Mesons Photons ANSWER DOWNLOAD EXAMIANS APP
Chemistry The number of neutrons present in an element having mass number 226 and atomic number 88 is : 88 314 50 138 88 314 50 138 ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following is usually not an air-pollutant? Hydrocarbons Carbon dioxide Sulphur dioxide Nitrous oxide Hydrocarbons Carbon dioxide Sulphur dioxide Nitrous oxide ANSWER DOWNLOAD EXAMIANS APP
Chemistry Permanent – hardness of water may be removed by addition of Sodium carbonate Potassium Permangante Alum Lime Sodium carbonate Potassium Permangante Alum Lime ANSWER DOWNLOAD EXAMIANS APP
Chemistry The purest form of water in nature is Sea water River water Lake water Rain water Sea water River water Lake water Rain water ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS