Chemistry Atomic number of an atom gives the number of which of the following ? Protons Neutrons and protons Neutrons Electrons Protons Neutrons and protons Neutrons Electrons ANSWER DOWNLOAD EXAMIANS APP
Chemistry The gas present in the stratosphere which filters out some of the sun's ultraviolet light and provides an effective shield against radiation damage to living things is methane ozone helium oxygen methane ozone helium oxygen ANSWER DOWNLOAD EXAMIANS APP
Chemistry Removal of carbon particles from air involves the principle of Filteration Sedimentation Electrophoresis Precipitation Filteration Sedimentation Electrophoresis Precipitation ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which one of the following metals does not react with water to produce Hydrogen ? Sodium Potassium Cadmium Lithium Sodium Potassium Cadmium Lithium ANSWER DOWNLOAD EXAMIANS APP
Chemistry The atomic number of carbon is 6 and its atomic mass is 12. How many are there protons in the nucleus of carbon ? Zero 18 6 12 Zero 18 6 12 ANSWER DOWNLOAD EXAMIANS APP
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