Chemistry The presence of ozone in the stratosphere is responsible for Checking the penetration of ultra-violet rays to the earth Supplying oxygen for people travelling in jets Increasing the average global temperature in recent years Higher rate of photosynthesis Checking the penetration of ultra-violet rays to the earth Supplying oxygen for people travelling in jets Increasing the average global temperature in recent years Higher rate of photosynthesis ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following is used to remove ink and rust stains on cloth? Kerosene oil Alcohol Ether Oxalic acid Kerosene oil Alcohol Ether Oxalic acid ANSWER DOWNLOAD EXAMIANS APP
Chemistry The fiber least prone to catch fire is Polyester Terylene Cotton Nylon Polyester Terylene Cotton Nylon ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following is used to make light weight, but strong plastic ? Methyl Methacrylate Polyvinyl Chloride Polythene Nylon Methyl Methacrylate Polyvinyl Chloride Polythene Nylon ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which one of the following chemicals helps in fruit ripening? Malathion Ethephon Atrazine Isoproturan Malathion Ethephon Atrazine Isoproturan ANSWER DOWNLOAD EXAMIANS APP
Chemistry The metal used to recover copper from a solution of copper sulphate is Ag Fe Hg Na Ag Fe Hg Na ANSWER DOWNLOAD EXAMIANS APP
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