Chemistry Chemical formula of washing soda is Ca(OH)2 Na2SO4.10H2O NaHCO3 Na2CO3.10H2O Ca(OH)2 Na2SO4.10H2O NaHCO3 Na2CO3.10H2O ANSWER DOWNLOAD EXAMIANS APP
Chemistry The metal that is usually extracted from sea water is Na Mg Ca K Na Mg Ca K ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following does the Nucleus of an atom consist of? Protons Protons and neutrons Electrons Protons and electrons Protons Protons and neutrons Electrons Protons and electrons ANSWER DOWNLOAD EXAMIANS APP
Chemistry What material is used to make electric heater coil ? Copper Silver Nichrome Iron Copper Silver Nichrome Iron ANSWER DOWNLOAD EXAMIANS APP
Chemistry Ionisation energy of nitrogen is greater than that of oxygen because nitrogen has Smaller atomic radius Stable half filled 2p sub level High nuclear charge High bond dissociation energy Smaller atomic radius Stable half filled 2p sub level High nuclear charge High bond dissociation energy ANSWER DOWNLOAD EXAMIANS APP
Chemistry Copper substances when exposed to air gains a green coating due to the formation of: CuCO3 Cu(OH)2 Cu(NO3)2 CuSO4 CuO CuCO3 Cu(OH)2 Cu(NO3)2 CuSO4 CuO ANSWER DOWNLOAD EXAMIANS APP
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