Chemistry The presence of ozone in the stratosphere is responsible for Supplying oxygen for people travelling in jets Higher rate of photosynthesis Checking the penetration of ultra-violet rays to the earth Increasing the average global temperature in recent years Supplying oxygen for people travelling in jets Higher rate of photosynthesis Checking the penetration of ultra-violet rays to the earth Increasing the average global temperature in recent years ANSWER DOWNLOAD EXAMIANS APP
Chemistry The most important ore of lead is Siderite Galena Magnetite Pyrolusite Siderite Galena Magnetite Pyrolusite ANSWER DOWNLOAD EXAMIANS APP
Chemistry Ultra purification of a metal is done by : Slugging Smelting Leaching Zone melting Slugging Smelting Leaching Zone melting ANSWER DOWNLOAD EXAMIANS APP
Chemistry Iodex, a pain relief balm, has the smell of ________ . Propyl salicylate Butyl salicylate Methyl salicylate Ethyl salicylate Propyl salicylate Butyl salicylate Methyl salicylate Ethyl salicylate ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following is not a gaseous air pollutant? Hydrocarbon Oxides of sulphur Oxides of nitrogen Smoke Hydrocarbon Oxides of sulphur Oxides of nitrogen Smoke ANSWER DOWNLOAD EXAMIANS APP
Chemistry The formula C6H5-CO-CH3 represents Phenyl acetate Acetophenone Acetic acid Acetone Phenyl acetate Acetophenone Acetic acid Acetone ANSWER DOWNLOAD EXAMIANS APP
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