Chemistry The presence of ozone in the stratosphere is responsible for Increasing the average global temperature in recent years Higher rate of photosynthesis Supplying oxygen for people travelling in jets Checking the penetration of ultra-violet rays to the earth Increasing the average global temperature in recent years Higher rate of photosynthesis Supplying oxygen for people travelling in jets Checking the penetration of ultra-violet rays to the earth ANSWER DOWNLOAD EXAMIANS APP
Chemistry The purest form of Iron is : Wrought iron Cast iron Steel Pig iron Wrought iron Cast iron Steel Pig iron ANSWER DOWNLOAD EXAMIANS APP
Chemistry The term 'brown air' is used for Photochemical smog Industrial smog Acid fumes Sulphurous smog Photochemical smog Industrial smog Acid fumes Sulphurous smog ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following is used as filler in tyre of rubber ? Graphite Coke Coal Carbon black Graphite Coke Coal Carbon black ANSWER DOWNLOAD EXAMIANS APP
Chemistry Brown stains in vessels and clothes indicate the presence of high quantities of ________ in water Magnesium None of these Calcium Manganese Magnesium None of these Calcium Manganese ANSWER DOWNLOAD EXAMIANS APP
Chemistry Solder is an alloy of Lead, zinc Copper, lead Tin, lead Sodium, lead Lead, zinc Copper, lead Tin, lead Sodium, lead ANSWER DOWNLOAD EXAMIANS APP
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