Chemistry Iron and manganese present as pollutants in water cannot be removed by________ Oxidation followed by settling and filtration Chlorination Lime soda process or manganese zeolite process Ion exchange process Oxidation followed by settling and filtration Chlorination Lime soda process or manganese zeolite process Ion exchange process ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which one of the following is not a ‘green house gas’ ? Nitrogen Chlorofluorocarbons Methane Carbon dioxide Nitrogen Chlorofluorocarbons Methane Carbon dioxide ANSWER DOWNLOAD EXAMIANS APP
Chemistry Peroxyacetyl nitrate is a Secondary pollutant Vitamin Acidic dye Plant hormone Secondary pollutant Vitamin Acidic dye Plant hormone ANSWER DOWNLOAD EXAMIANS APP
Chemistry Sodium vapour lamps glow with yellow colour. This is due to sublimation of sodium to emit yellow colour The emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum Its ability to absorb all other colours except yellow The low ionisation energy of sodium sublimation of sodium to emit yellow colour The emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum Its ability to absorb all other colours except yellow The low ionisation energy of sodium ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which mineral is the ore of aluminium ? Magnetite Haematite Bauxite Siderite Magnetite Haematite Bauxite Siderite ANSWER DOWNLOAD EXAMIANS APP
Chemistry Sour taste of ‘Coca Cola’ is due to the presence of Phosphoric acid Acetic acid Hydrochloric acid Formic acid Phosphoric acid Acetic acid Hydrochloric acid Formic acid ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS