Chemistry Sodium vapour lamps glow with yellow colour. This is due to The emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum The low ionisation energy of sodium Its ability to absorb all other colours except yellow sublimation of sodium to emit yellow colour The emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum The low ionisation energy of sodium Its ability to absorb all other colours except yellow sublimation of sodium to emit yellow colour ANSWER DOWNLOAD EXAMIANS APP
Chemistry Ozone saves the biosphere by absorbing high energy radiations called ________ . Gamma rays Ultraviolet rays (UV) X–rays Infra-red (IR) Gamma rays Ultraviolet rays (UV) X–rays Infra-red (IR) ANSWER DOWNLOAD EXAMIANS APP
Chemistry The scientist who experimentally proved the existance of positron is Anderson Bohr Fermi Bethe Anderson Bohr Fermi Bethe ANSWER DOWNLOAD EXAMIANS APP
Chemistry One of the constituents of tear gas is Ether Chloropicrin Ethanol Ethane Ether Chloropicrin Ethanol Ethane ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following is used in making smoke bombs? Carbon Sulphur Phosphorus Hydrogen Carbon Sulphur Phosphorus Hydrogen ANSWER DOWNLOAD EXAMIANS APP
Chemistry The important metal used with iron to produce stainless steel is Carbon Chromium Aluminium Tin Carbon Chromium Aluminium Tin ANSWER DOWNLOAD EXAMIANS APP
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