Chemistry Oxygen has (+) oxidation number only in C12O OF2 H2O (2) N2O C12O OF2 H2O (2) N2O ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which one of the following contributes largely to the ‘green house effect’ ? Carbon monoxide Ozone Carbon dioxide Water vapour Carbon monoxide Ozone Carbon dioxide Water vapour ANSWER DOWNLOAD EXAMIANS APP
Chemistry The total energy of revolving electron in an atom Can never be positive Cannot be negative Can have any value above zero Will always be positive Can never be positive Cannot be negative Can have any value above zero Will always be positive ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which is not a green house gas ? CO2 Chlorofluorocarbons CH4 N2O CO2 Chlorofluorocarbons CH4 N2O ANSWER DOWNLOAD EXAMIANS APP
Chemistry Nitrogen forms a variety of compounds in all oxidation states ranging from –3 to + 5 –3 to + 6 –3 to + 4 –3 to + 3 –3 to + 5 –3 to + 6 –3 to + 4 –3 to + 3 ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which among the following is used to dilute oxygen in the gas cylinders used by divers ? Helium Krypton Neon Argon Helium Krypton Neon Argon ANSWER DOWNLOAD EXAMIANS APP
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