Chemistry Which one of the following metals pollutes the air of a city having large number of automobiles? Chromium Copper Lead Cadmium Chromium Copper Lead Cadmium ANSWER DOWNLOAD EXAMIANS APP
Chemistry The smog is essentially caused by the presence of O3 and N2 O2 and O3 Oxides of N and S O2 and N2 O3 and N2 O2 and O3 Oxides of N and S O2 and N2 ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which is known as carbolic acid? Acetic acid Ethanol Phenol Oxalic acid Acetic acid Ethanol Phenol Oxalic acid ANSWER DOWNLOAD EXAMIANS APP
Chemistry Conduction band electrons have more mobility than holes because they Experience collision less frequently Need less energy to move them Are lighter Have negative charge Experience collision less frequently Need less energy to move them Are lighter Have negative charge ANSWER DOWNLOAD EXAMIANS APP
Chemistry Electric bulbs are filled with : Carbon dioxide Argon Nitrogen Oxygen Carbon dioxide Argon Nitrogen Oxygen ANSWER DOWNLOAD EXAMIANS APP
Chemistry Ozone saves the biosphere by absorbing high energy radiations called ________ . Gamma rays Infra-red (IR) Ultraviolet rays (UV) X–rays Gamma rays Infra-red (IR) Ultraviolet rays (UV) X–rays ANSWER DOWNLOAD EXAMIANS APP
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