Chemistry The ionisation energy of hydrogen atom in the ground state is x KJ. The energy required for an electron to jump from 2nd orbit to 3rd orbit is 7.2 x x/6 5x 5x/36 7.2 x x/6 5x 5x/36 ANSWER DOWNLOAD EXAMIANS APP
Chemistry Stalactites and Stalagmites form due to the precipitation of : MgCO3 MgCl2 CaCO3 CaCl2 MgCO3 MgCl2 CaCO3 CaCl2 ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which one of the following is used for dating very old objects of archaeological importance? Carbon-14 Phosphorus-31 Radium Tritium Carbon-14 Phosphorus-31 Radium Tritium ANSWER DOWNLOAD EXAMIANS APP
Chemistry Ozone saves the biosphere by absorbing high energy radiations called ________ . X–rays Infra-red (IR) Gamma rays Ultraviolet rays (UV) X–rays Infra-red (IR) Gamma rays Ultraviolet rays (UV) ANSWER DOWNLOAD EXAMIANS APP
Chemistry Natural rubber is the polymer of : Ethylene Butadiene Styrene Isoprene Ethylene Butadiene Styrene Isoprene ANSWER DOWNLOAD EXAMIANS APP
Chemistry Ruby and sapphire are oxides of Tin Copper Iron Aluminium Tin Copper Iron Aluminium ANSWER DOWNLOAD EXAMIANS APP
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