Chemistry Which of the following metals is not a pollutant ? Lead Aluminium Arsenic Mercury Lead Aluminium Arsenic Mercury ANSWER DOWNLOAD EXAMIANS APP
Chemistry A powerful eye irritant present in smog is Sulphur dioxide Nitric oxide Peroxyacetyl nitrate Carbon dioxide Sulphur dioxide Nitric oxide Peroxyacetyl nitrate Carbon dioxide ANSWER DOWNLOAD EXAMIANS APP
Chemistry Copper is refined by Electrolysis Zone refining Roasting Oxidation Electrolysis Zone refining Roasting Oxidation 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 Have negative charge Are lighter Experience collision less frequently Need less energy to move them Have negative charge Are lighter ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which type of radiations are absorbed by the upper layer of the atmosphere? Infrared Visible Ultraviolet Radio-waves Infrared Visible Ultraviolet Radio-waves ANSWER DOWNLOAD EXAMIANS APP
Chemistry Total number of naturally occurring elements 98 92 62 110 98 92 62 110 ANSWER DOWNLOAD EXAMIANS APP
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