Chemical KineticsRate of Appearance of Products451Choose the best answerFor the reaction 2A ⇌ 4B + C, the concentration of B increases by 5 × 10⁻³ mol L⁻¹ in 10 s. The rate of appearance of B is:A5 × 10⁻⁴ mol L⁻¹ s⁻¹B5 × 10⁻³ mol L⁻¹ s⁻¹C6 × 10⁻⁵ mol L⁻¹ s⁻¹D4 × 10⁻⁴ mol L⁻¹ s⁻¹ Like 0 Discuss 0Share
Chemical BondingElectron-Pair Geometry and Molecular Shape452Choose the best answerWhich species has different molecular geometry and electron-pair geometry?ASO₃BSnCl₂CCO₂DBF₃ Like 0 Discuss 0Share
Atomic Structure STBAtomic Structure MCQs (STB)#Atomic Structure#Bohr Model453Choose the best answerAn electron falls from E₂ to the lower level E₁. What is the energy of the emitted photon?AE₁ − E₂BE₂ − E₁CE₁ + E₂DE₂/E₁ Like 0 Discuss 0Share
LiquidsIntermolecular Forces and Boiling Point454Choose the best answerAmong substances A, B and C with IMF strength A < B < C, which has the lowest expected boiling point?AABBCCDAll are equal Like 0 Discuss 0Share
Sindh MDCAT 2022 Chemistry#Alcohols#Alcohols and Phenols455Choose the best answerAlkyl halide on reaction with aqueous NaOH gives an alcohol. The mechanism is: (Sindh MDCAT 2022)ASNBEliminationCDecompositionDElectrophilic substitution reaction Like 0 Discuss 0Share