Chemistry The chief constituent of natural gas is: Nitrogen Methane Propane Helium Nitrogen Methane Propane Helium ANSWER DOWNLOAD EXAMIANS APP
Chemistry The metallic constituents of hard water are : Iron, tin and calcium Calcium, magnesium and iron Magnesium, calcium and tin Magnesium, tin and iron Iron, tin and calcium Calcium, magnesium and iron Magnesium, calcium and tin Magnesium, tin and iron ANSWER DOWNLOAD EXAMIANS APP
Chemistry An electrochemical cell which is used as a source of direct electrical current at constant voltage under standard conditions is called a : Battery Power transmittor Generator Uninterrupted power supply (UPS) Battery Power transmittor Generator Uninterrupted power supply (UPS) ANSWER DOWNLOAD EXAMIANS APP
Chemistry Ozone layer in the upper parts of the atmosphere serves as a protective shield against harmful Solar ultraviolet radiation CO2 in the air SO2 in the air Solar infrared radiation Solar ultraviolet radiation CO2 in the air SO2 in the air Solar infrared radiation ANSWER DOWNLOAD EXAMIANS APP
Chemistry The rusting of iron is a/an Physical change None of these Electrochemical change Electrical change Physical change None of these Electrochemical change Electrical change ANSWER DOWNLOAD EXAMIANS APP
Chemistry Neoprene is a polymer of Isopentane Isobutane Isoprene Chloroprene Isopentane Isobutane Isoprene Chloroprene ANSWER DOWNLOAD EXAMIANS APP
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