Fundamental Principles of Organic ChemistryMeso Compounds and Internal Compensation341Choose the best answerA meso compound is optically inactive because of:AExternal compensationBInternal compensationCAbsence of carbon atomsDResonance Like 0 Discuss 0Share
LiquidsEnthalpy of Vaporization342Choose the best answerThe molar enthalpy of vaporization of water at its normal boiling point is approximately:A40.7 kJ mol⁻¹B40.7 J mol⁻¹C4.07 kJ mol⁻¹D407 kJ mol⁻¹ Like 0 Discuss 0Share
BasicsStoichiometry #Atomic Structure#Subatomic Particles343Choose the best answerAn atom has atomic number 35 and mass number 80. Which option gives its correct composition?A35 protons, 35 electrons, 45 neutronsB35 protons, 35 electrons, 80 neutronsC35 protons, 36 electrons, 45 neutronsD35 protons, 36 electrons, 80 neutrons Like 0 Discuss 0Share
Atomic StructureDegenerate Orbitals344Choose the best answerIn the absence of an external electric or magnetic field, which pair of orbitals is degenerate?A2s and 3sB3dxy and 3dxzC3s and 3pD3p and 4p Like 0 Discuss 0Share
Chemical EquilibriumLe Chatelier’s Principle345Choose the best answerThe reaction CaCO₃(s) ⇌ CaO(s) + CO₂(g) can proceed nearly to completion in a lime kiln because:ATemperature has no effectBCaO is always more stable than CaCO₃CCaO continuously decomposesDCO₂ is continuously removed Like 0 Discuss 0Share