Chemistry Copper substances when exposed to air gains a green coating due to the formation of: CuCO3 Cu(OH)2 CuO Cu(NO3)2 CuSO4 CuCO3 Cu(OH)2 CuO Cu(NO3)2 CuSO4 ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following kinds of spectroscopy can provide information on the energy difference between the initial and final states rather the energy levels involved in the transition UV photoelectron spectroscopy Rotational spectroscopy Infrared absorption spectroscopy UV absorption spectroscopy UV photoelectron spectroscopy Rotational spectroscopy Infrared absorption spectroscopy UV absorption spectroscopy ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following has no unit Electron affinity Excitation potential Ionization energy Electronegativity Electron affinity Excitation potential Ionization energy Electronegativity ANSWER DOWNLOAD EXAMIANS APP
Chemistry For a spontaneous chemical process, the free energy change is Depends on whether the reaction is exothermic or endothermic Zero Positive Negative Depends on whether the reaction is exothermic or endothermic Zero Positive Negative ANSWER DOWNLOAD EXAMIANS APP
Chemistry The lustre of the metals is because of Reflection of light due to the presence of free electrons High polish High density, due to closed packing of atoms Absorption of light due to the presence of cavities Reflection of light due to the presence of free electrons High polish High density, due to closed packing of atoms Absorption of light due to the presence of cavities ANSWER DOWNLOAD EXAMIANS APP
Chemistry Aquaregia is a mixture of the following in the ratio 1 : 3 by volume Dil. HCl and dil. HNO3 Conc. HCl and conc. HNO3 Conc. HNO3 and conc. H2SO4 Conc. HNO3 and conc. HCl Dil. HCl and dil. HNO3 Conc. HCl and conc. HNO3 Conc. HNO3 and conc. H2SO4 Conc. HNO3 and conc. HCl ANSWER DOWNLOAD EXAMIANS APP
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