Chemistry Copper substances when exposed to air gains a green coating due to the formation of: Cu(NO3)2 CuSO4 CuCO3 Cu(OH)2 CuO Cu(NO3)2 CuSO4 CuCO3 Cu(OH)2 CuO ANSWER DOWNLOAD EXAMIANS APP
Chemistry Warming Ammonium chloride with sodium hydrochloride in a test tube is an example of Closed system Open system Isothermal system Isobaric system Closed system Open system Isothermal system Isobaric system ANSWER DOWNLOAD EXAMIANS APP
Chemistry When conc. H2SO4 is added to dry KNO3, brown fumes are evolved. These fumes are due to SO3 NO2 SO2 N2O SO3 NO2 SO2 N2O ANSWER DOWNLOAD EXAMIANS APP
Chemistry Among the following, which is always found in free-state in nature? Sodium Gold Silver Copper Sodium Gold Silver Copper ANSWER DOWNLOAD EXAMIANS APP
Chemistry The antiparticle of an electron is Beta particles Alpha particles Proton Positron Beta particles Alpha particles Proton Positron ANSWER DOWNLOAD EXAMIANS APP
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