Chemistry The first metal used by man was iron bronze copper gold iron bronze copper gold ANSWER DOWNLOAD EXAMIANS APP
Chemistry Oxygen has (+) oxidation number only in H2O (2) C12O OF2 N2O H2O (2) C12O OF2 N2O ANSWER DOWNLOAD EXAMIANS APP
Chemistry In deep-sea diving, divers use a mixture of gases consisting of oxygen and Hydrogen Helium Nitrogen Argon Hydrogen Helium Nitrogen Argon ANSWER DOWNLOAD EXAMIANS APP
Chemistry What particles move around the nucleus of an atom and are negatively charged? Electrons Protons Positrons Neutrons Electrons Protons Positrons Neutrons ANSWER DOWNLOAD EXAMIANS APP
Chemistry Metal are good conductors, because They contain reflecting surface The molecules in them are very close to each other They contain free electrons The molecules in them collide very freely They contain reflecting surface The molecules in them are very close to each other They contain free electrons The molecules in them collide very freely ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which one is the most dense liquid from the below None of these Choloform Water Gasolin None of these Choloform Water Gasolin ANSWER DOWNLOAD EXAMIANS APP