Chemistry Which of the following pairs of materials serves as electrodes in chargeable batteries commonly used in devices such as torch lights, electric shavers, etc. ? Iron and cadmium Zinc and carbon Lead peroxide and lead Nickel and cadmium Iron and cadmium Zinc and carbon Lead peroxide and lead Nickel and cadmium ANSWER DOWNLOAD EXAMIANS APP
Chemistry When a metal is heated in a flame, the electrons absorb energy and jump to higher energy state. On coming back to the lower energy siate, they emit light, which we can observe in Emission spectra Raman spectra Absorption spectra Fluorescence Emission spectra Raman spectra Absorption spectra Fluorescence ANSWER DOWNLOAD EXAMIANS APP
Chemistry Acid rain is caused by the pollution of environment by Carbon monoxide and Carbon dioxide Ozone and Carbon dioxide Carbon dioxide and Nitrogen Nitrous oxide and Sulphur dioxide Carbon monoxide and Carbon dioxide Ozone and Carbon dioxide Carbon dioxide and Nitrogen Nitrous oxide and Sulphur dioxide ANSWER DOWNLOAD EXAMIANS APP
Chemistry In which of the following states maximum iron ore is found ? Fe2O3 Fe3O4 FeCO3 FeS2 Fe2O3 Fe3O4 FeCO3 FeS2 ANSWER DOWNLOAD EXAMIANS APP
Chemistry Sulphur dioxide present in the industrial chimney exhaust causes All of these Respiratory and lung disease Reduction in plant's productivity owing to acid rain Corrosion building materials All of these Respiratory and lung disease Reduction in plant's productivity owing to acid rain Corrosion building materials ANSWER DOWNLOAD EXAMIANS APP
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