Atomic Structure STBAtomic Structure MCQs (STB)#Atomic Structure#Bohr Model611Choose 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
Chemical BondingMolecular Geometry and Planarity612Choose the best answerIn which molecule are all atoms coplanar?ACH₄BNH₃CBF₃DPH₃ Like 0 Discuss 0Share
Chemistry of HydrocarbonsStability of Alkenes613Choose the best answerWhich alkene is generally the most stable?AMonosubstituted alkeneBDisubstituted alkeneCTrisubstituted alkeneDTetrasubstituted alkene Like 2 Discuss 0Share
Sindh MDCAT 2020 Chemistry#Benzene & Aromatic Compounds#Benzene Sulphonation614Choose the best answerElectrophile in sulphonation of benzene is: (Sindh MDCAT 2020)AHSO₄⁻BH₂SO₄CSO₃DHSO₃⁻ Like 0 Discuss 0Share
SolidsMolecular Solids615Choose the best answerWhich of the following is a molecular crystal?ASiCBNaClCGraphiteDIce Like 0 Discuss 0Share