Chemistry A balloon filled with helium rises in air because 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 The balloon is weightless ANSWER DOWNLOAD EXAMIANS APP
Chemistry The nuclear particles which are assumed to hold the nucleons together are neutrons electrons positrons mesons neutrons electrons positrons mesons ANSWER DOWNLOAD EXAMIANS APP
Chemistry Chemical formula of washing soda is Na2SO4.10H2O Na2CO3.10H2O NaHCO3 Ca(OH)2 Na2SO4.10H2O Na2CO3.10H2O NaHCO3 Ca(OH)2 ANSWER DOWNLOAD EXAMIANS APP
Chemistry The chief constituent of natural gas is: Helium Nitrogen Propane Methane Helium Nitrogen Propane Methane ANSWER DOWNLOAD EXAMIANS APP
Chemistry The chemical name of baking soda is Sodium carbonate Sodium chloride Sodium bicarbonate Sodium nitrate Sodium carbonate Sodium chloride Sodium bicarbonate Sodium nitrate ANSWER DOWNLOAD EXAMIANS APP
Chemistry Milk tastes sour when it is left in open for some time. This happens due to the formation of Lactic acid Acetic acid Citric acid Carbonic acid Lactic acid Acetic acid Citric acid Carbonic acid ANSWER DOWNLOAD EXAMIANS APP
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