Chemistry Which of the following is used in welding broken pieces of iron rails and machine parts? Aluminium powder None of these Solder Aluminium sulphate Aluminium powder None of these Solder Aluminium sulphate ANSWER DOWNLOAD EXAMIANS APP
Chemistry Iron is prevented from rusting by coating with zinc. This process is called as Galvanisation Reduction Sublimation Corrosion Galvanisation Reduction Sublimation Corrosion ANSWER DOWNLOAD EXAMIANS APP
Chemistry Oxygen has (+) oxidation number only in OF2 C12O N2O H2O (2) OF2 C12O N2O H2O (2) ANSWER DOWNLOAD EXAMIANS APP
Chemistry The most abundant metal in the Earth’s crust is Zinc Iron Aluminium Copper Zinc Iron Aluminium Copper ANSWER DOWNLOAD EXAMIANS APP
Chemistry Metal are good conductors, because They contain reflecting surface They contain free electrons The molecules in them collide very freely The molecules in them are very close to each other They contain reflecting surface They contain free electrons The molecules in them collide very freely The molecules in them are very close to each other ANSWER DOWNLOAD EXAMIANS APP
Chemistry Bleaching powder is used in drinking water as a/an Antiseptic Antibiotic Coagulant Disinfectant Antiseptic Antibiotic Coagulant Disinfectant ANSWER DOWNLOAD EXAMIANS APP
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