Chemistry Brass gets discoloured in air due to constant exposure in presence of: Hydrogen sulphide Aluminium phosphide Hydrogenated wafers Aluminium sulphide Hydrogen sulphide Aluminium phosphide Hydrogenated wafers Aluminium sulphide ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which among the following is a covalent compound ? Calcium chloride Carbon tetrachloride Sodium chloride Magnesium fluoride Calcium chloride Carbon tetrachloride Sodium chloride Magnesium fluoride ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which one of the following has greatest mass ? Electron Proton Hydrogen nucleus Neutron Electron Proton Hydrogen nucleus Neutron ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following is an iron ore ? Lignite Magnetite Nitrite Bauxite Lignite Magnetite Nitrite Bauxite ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which one of the following is used for dating very old objects of archaeological importance? Tritium Phosphorus-31 Carbon-14 Radium Tritium Phosphorus-31 Carbon-14 Radium ANSWER DOWNLOAD EXAMIANS APP
Chemistry Bleaching action of moist sulphur di-oxide is because of its Oxidising property Acidic property Reducing property Basic property Oxidising property Acidic property Reducing property Basic property ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS