Chemistry Which one of the following is used for dating very old objects of archaeological importance? Carbon-14 Tritium Radium Phosphorus-31 Carbon-14 Tritium Radium Phosphorus-31 ANSWER DOWNLOAD EXAMIANS APP
Chemistry Detergents are Sodium salt of benzoic acid Sodium salts of sulphonic acids None of these Sodium salts of fatty acids Sodium salt of benzoic acid Sodium salts of sulphonic acids None of these Sodium salts of fatty acids ANSWER DOWNLOAD EXAMIANS APP
Chemistry Sodium vapour lamps glow with yellow colour. This is due to Its ability to absorb all other colours except yellow sublimation of sodium to emit yellow colour The low ionisation energy of sodium The emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum Its ability to absorb all other colours except yellow sublimation of sodium to emit yellow colour The low ionisation energy of sodium The emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum ANSWER DOWNLOAD EXAMIANS APP
Chemistry The chemical(s) most commonly used for cloud seeding or ‘artificial rainmaking’ is/are All listed here Sodium Chloride Dry ice or frozen carbon dioxide Silver Iodide All listed here Sodium Chloride Dry ice or frozen carbon dioxide Silver Iodide ANSWER DOWNLOAD EXAMIANS APP
Chemistry The major harmful gas emitted by automobile vehicle which causes air pollution is Ozone gas Methane Carbon dioxide Carbon Monoxide Ozone gas Methane Carbon dioxide Carbon Monoxide ANSWER DOWNLOAD EXAMIANS APP
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