Chemistry The gas used for filling weather balloons is Helium Hydrogen Nitrogen Air Helium Hydrogen Nitrogen Air ANSWER DOWNLOAD EXAMIANS APP
Chemistry The most important ore of aluminium is bauxite magnetite haematite monazite bauxite magnetite haematite monazite ANSWER DOWNLOAD EXAMIANS APP
Chemistry Williamson's synthesis is widely used in the laboratory preparation of Ethers Alcohols Esters Aldehydes Ethers Alcohols Esters Aldehydes ANSWER DOWNLOAD EXAMIANS APP
Chemistry Of the following commonly used materials, the one that is not an alloy is Brass Bronze Steel Copper Brass Bronze Steel Copper ANSWER DOWNLOAD EXAMIANS APP
Chemistry Sea weeds are important source of Iron Iodine Chlorine Bromine Iron Iodine Chlorine Bromine ANSWER DOWNLOAD EXAMIANS APP
Chemistry For a spontaneous chemical process, the free energy change is Positive Depends on whether the reaction is exothermic or endothermic Negative Zero Positive Depends on whether the reaction is exothermic or endothermic Negative Zero ANSWER DOWNLOAD EXAMIANS APP
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