Chemistry Which metal is the heaviest in periodic table among the following ? Pt Pb W Os Pt Pb W Os ANSWER DOWNLOAD EXAMIANS APP
Chemistry The oxidation number of nickel in K4[Ni(CN)4] is Zero 8 –4 4 Zero 8 –4 4 ANSWER DOWNLOAD EXAMIANS APP
Chemistry What particles move around the nucleus of an atom and are negatively charged? Protons Neutrons Positrons Electrons Protons Neutrons Positrons Electrons ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which method will be employed to test the hardness of water? Distillation Formation of lather with soap None of these Boiling Distillation Formation of lather with soap None of these Boiling ANSWER DOWNLOAD EXAMIANS APP
Chemistry Combustion of a candle is a/an Exothermic reaction Photochemical reaction Endothermic reaction Physical change Exothermic reaction Photochemical reaction Endothermic reaction Physical change ANSWER DOWNLOAD EXAMIANS APP
Chemistry Earth’s atmosphere is an envelope of gases extending to a height of 150 km 200 km 300 km 100 km 150 km 200 km 300 km 100 km ANSWER DOWNLOAD EXAMIANS APP
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