Atomic StructureShells, Subshells and Orbitals551Choose the best answerHow many orbitals are present in the shell with n = 3?A1B3C4D9 Like 0 Discuss 0Share
Sindh MDCAT 2021 Chemistry#Benzene & Aromatic Compounds#Electrophilic Substitution552Choose the best answerWhich of the following gives electrophilic substitution reaction:ABenzeneBFormaldehydeCEthanolDEthyne Like 0 Discuss 0Share
Periodic TableReactivity of Metals553Choose the best answerWhich metal is most reactive among the following?ALiBCaCMgDNa Like 0 Discuss 0Share
Stoichiometry Stoichiometry MCQS#Atomic Mass Unit554Choose the best answerIf an atom has a mass of 4 u, what does this mean?AIts mass is 4 g.BIt has 4 neutrons.CIts mass is four times the mass of 1 amu.DIt must be hydrogen. Like 0 Discuss 0Share
Atomic Structure STBAtomic Structure MCQs (STB)#Atomic Structure#Bohr Model555Choose the best answerWhat does the negative sign in the electron–nucleus potential-energy expression indicate?AThe nucleus and electron repel each otherBThe electron-nucleus system is bound by attractive forcesCThe electron possesses a positive chargeDPotential energy is independent of distance Like 0 Discuss 0Share