Chemical BondingElectron-Pair Repulsions211Choose the best answerWhich pair of molecules contains two lone pairs on the central atom and therefore shows the maximum variety of electron-pair repulsions?AH₂O onlyBH₃O⁺ onlyCH₂S onlyDH₂O and H₂S Like 0 Discuss 0Share
Atomic Structure STBAtomic Structure MCQs (STB)#Atomic Structure#Atomic Theory212Choose the best answerWhat does the Greek word “atomos” mean?AIndivisibleBElectrically neutralCInfinitely smallDChemically inert Like 0 Discuss 0Share
Sindh MDCAT 2021 Chemistry#Benzene & Aromatic Compounds#Orientation Effect213Choose the best answerWhich one of the following is a meta directing group:A-NH₂B-CH₃C-NO₂D-OH Like 0 Discuss 0Share
Chemistry of HydrocarbonsHydration of Alkynes214Choose the best answerThe immediate product formed during acid-catalysed hydration of an alkyne is:AAlkaneBEnolCAlkyl halideDEther Like 0 Discuss 0Share
Atomic StructureBohr's Atomic Model215Choose the best answerIn Bohr's theory, the allowed electronic energy levels of hydrogen are represented by:AContinuous energy bandsBQuantized stationary orbitsCHybrid orbitalsDMolecular orbitals Like 0 Discuss 0Share