Chemistry The method that cannot be used for removing permanent hardness of water is boiling adding sodium carbonate adding caustic soda distillation boiling adding sodium carbonate adding caustic soda distillation ANSWER DOWNLOAD EXAMIANS APP
Chemistry Bleaching powder is used in drinking water as a/an Antiseptic Antibiotic Coagulant Disinfectant Antiseptic Antibiotic Coagulant Disinfectant ANSWER DOWNLOAD EXAMIANS APP
Chemistry When iron rusts, its weight First increases and then decreases Increases Decreases Remains the same First increases and then decreases Increases Decreases Remains the same ANSWER DOWNLOAD EXAMIANS APP
Chemistry The important ore of aluminium is Cryolite Fluorspar Bauxite Haematite Cryolite Fluorspar Bauxite Haematite ANSWER DOWNLOAD EXAMIANS APP
Chemistry A balloon filled with helium rises in air because Helium is less dense than air Helium pushes down on the air below the balloon The balloon is weightless Air exerts an upward force on the balloon Helium is less dense than air Helium pushes down on the air below the balloon The balloon is weightless Air exerts an upward force on the balloon ANSWER DOWNLOAD EXAMIANS APP
Chemistry The gas produced in marshy places due to decomposition of vegetation is Sulphur dioxide Carbon dioxide Carbon monoxide Methane Sulphur dioxide Carbon dioxide Carbon monoxide Methane ANSWER DOWNLOAD EXAMIANS APP
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