Chemistry The gas that usually causes explosions in coal mines is Methane Carbon monoxide Hydrogen Air Methane Carbon monoxide Hydrogen Air ANSWER DOWNLOAD EXAMIANS APP
Chemistry The total energy of revolving electron in an atom Can never be positive Will always be positive Can have any value above zero Cannot be negative Can never be positive Will always be positive Can have any value above zero Cannot be negative ANSWER DOWNLOAD EXAMIANS APP
Chemistry Silicon is used in All of these Transistors Semiconductors Solar energy devices All of these Transistors Semiconductors Solar energy devices ANSWER DOWNLOAD EXAMIANS APP
Chemistry The iron ore which contains 72% of iron is : Limonite Magnetite Haematite Siderite Limonite Magnetite Haematite Siderite ANSWER DOWNLOAD EXAMIANS APP
Chemistry In galvanization, iron is coated with Tin Nickel Zinc Copper Tin Nickel Zinc Copper ANSWER DOWNLOAD EXAMIANS APP
Chemistry Chemical name of bleaching powder is : Calcium bi chloride Calcium hypochlorite Calcium chloro hypochlorite Calcium chlorate Calcium bi chloride Calcium hypochlorite Calcium chloro hypochlorite Calcium chlorate ANSWER DOWNLOAD EXAMIANS APP
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