Chemistry A balloon filled with helium rises in air because The balloon is weightless Helium is less dense than air Air exerts an upward force on the balloon Helium pushes down on the air below the balloon The balloon is weightless Helium is less dense than air Air exerts an upward force on the balloon Helium pushes down on the air below the balloon ANSWER DOWNLOAD EXAMIANS APP
Chemistry Substance used as an anti freeze in radiators of automobiles is : Ethyl alcohol Ethyl alcohol and H2O Methyl alcohol Methyl alcohol and H2O Ethyl alcohol Ethyl alcohol and H2O Methyl alcohol Methyl alcohol and H2O ANSWER DOWNLOAD EXAMIANS APP
Chemistry Galvanization is the : Deposition of aluminium on iron Deposition of zinc on iron Deposition of tin on iron Deposition of copper on iron Deposition of aluminium on iron Deposition of zinc on iron Deposition of tin on iron Deposition of copper on iron ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following kinds of spectroscopy can provide information on the energy difference between the initial and final states rather the energy levels involved in the transition Rotational spectroscopy UV photoelectron spectroscopy UV absorption spectroscopy Infrared absorption spectroscopy Rotational spectroscopy UV photoelectron spectroscopy UV absorption spectroscopy Infrared absorption spectroscopy ANSWER DOWNLOAD EXAMIANS APP
Chemistry Most poisonous pollutant in water is Arsenic Detergent Zinc Phosphate Arsenic Detergent Zinc Phosphate ANSWER DOWNLOAD EXAMIANS APP
Chemistry The product, 9-nitroanthracene is obtained from anthracene by the action of Nitric acid and ethyl alcohol Nitric acid and acetic acid Nitric acid in excess Nitric acid and acetic anhydride Nitric acid and ethyl alcohol Nitric acid and acetic acid Nitric acid in excess Nitric acid and acetic anhydride ANSWER DOWNLOAD EXAMIANS APP
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