Chemistry The smog is essentially caused by the presence of O3 and N2 O2 and O3 O2 and N2 Oxides of N and S O3 and N2 O2 and O3 O2 and N2 Oxides of N and S ANSWER DOWNLOAD EXAMIANS APP
Chemistry When formaldehyde and potassium hydroxide are heated, we get Acetylene Ethyl formate Methane Methyl alcohol Acetylene Ethyl formate Methane Methyl alcohol ANSWER DOWNLOAD EXAMIANS APP
Chemistry The metal that is used as a catalyst in the hydrogenation of oils is Ni Pt Cu Pb Ni Pt Cu Pb ANSWER DOWNLOAD EXAMIANS APP
Chemistry The first metal used by a man was Bronze Silver Copper Brass Bronze Silver Copper Brass ANSWER DOWNLOAD EXAMIANS APP
Chemistry In addition to hydrogen, the other abundant element present on Sun’s surface is Helium Argon Oxygen Neon Helium Argon Oxygen Neon ANSWER DOWNLOAD EXAMIANS APP
Chemistry Ozone layer in the upper parts of the atmosphere serves as a protective shield against harmful CO2 in the air Solar infrared radiation SO2 in the air Solar ultraviolet radiation CO2 in the air Solar infrared radiation SO2 in the air Solar ultraviolet radiation ANSWER DOWNLOAD EXAMIANS APP