Chemistry Brass gets discoloured in air due to constant exposure in presence of: Aluminium phosphide Hydrogenated wafers Hydrogen sulphide Aluminium sulphide Aluminium phosphide Hydrogenated wafers Hydrogen sulphide Aluminium sulphide ANSWER DOWNLOAD EXAMIANS APP
Chemistry The most abundant metal in the Earth’s crust is Zinc Aluminium Copper Iron Zinc Aluminium Copper Iron ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which is the purest commercial form of iron ? Steel Stainless steel Pig iron Wrought iron Steel Stainless steel Pig iron Wrought iron ANSWER DOWNLOAD EXAMIANS APP
Chemistry Zone refining is used for the purification of Ge Cu Ag Au Ge Cu Ag Au ANSWER DOWNLOAD EXAMIANS APP
Chemistry Photo-oxidation process is initiated by Catalyst Light Oxygen Heat Catalyst Light Oxygen Heat ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following is a secondary pollutant ? CO SO2 NO PAN CO SO2 NO PAN ANSWER DOWNLOAD EXAMIANS APP
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