Chemistry Brown stains in vessels and clothes indicate the presence of high quantities of ________ in water Magnesium Calcium None of these Manganese Magnesium Calcium None of these Manganese ANSWER DOWNLOAD EXAMIANS APP
Chemistry In which of the following states maximum iron ore is found ? FeS2 Fe3O4 Fe2O3 FeCO3 FeS2 Fe3O4 Fe2O3 FeCO3 ANSWER DOWNLOAD EXAMIANS APP
Chemistry Trinitrotoluene is Used as an abrasive Used to fuse two metals Used as an explosive Used to melt metals Used as an abrasive Used to fuse two metals Used as an explosive Used to melt metals ANSWER DOWNLOAD EXAMIANS APP
Chemistry Heating of a ore below its melting point in the absence of air is known as Refining Smelting Calcination Roasting Refining Smelting Calcination Roasting ANSWER DOWNLOAD EXAMIANS APP
Chemistry Submarines move under water. They have engines that run on Diesel Batteries Steam Petrol and oxygen Diesel Batteries Steam Petrol and oxygen ANSWER DOWNLOAD EXAMIANS APP
Chemistry What is the most commonly used substance in fluorescent tubes? Mercury vapour and argon Mercury oxide and neon Sodium oxide and argon Sodium vapour and neon Mercury vapour and argon Mercury oxide and neon Sodium oxide and argon Sodium vapour and neon ANSWER DOWNLOAD EXAMIANS APP
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