Chemical BondingIsostructural Species1051Choose the best answerCO₂ is isostructural with:AH₂SBSO₂CCS₂DSnCl₂ Like 0 Discuss 0Share
Chemical KineticsUnits of Rate Constant1052Choose the best answerWhich statement is correct?AReaction rate and first-order rate constant always have the same units.BIn every pseudo-order reaction, rate equals the rate constant.CThe unit of the rate constant depends on the overall order of reaction.DEvery photochemical reaction is first order. Like 0 Discuss 0Share
StoichiometryMass–Volume Stoichiometry1053Choose the best answerWhat volume of NH₃ at STP (273 K and 1 atm) is required to react completely with 49 g H₂SO₄? 2NH₃ + H₂SO₄ → (NH₄)₂SO₄A44.8 LB22.4 LC11.2 LD5.6 L Like 0 Discuss 0Share
Basic Concepts of ChemistryPhysical and Chemical Changes1054Choose the best answerA physical change involves:ANo change in energyBEnergy is always absorbedCEnergy is always releasedDNone of these Like 0 Discuss 0Share
Atomic StructureHund's Rule1055Choose the best answerWhich statement describes Hund's rule rather than Pauli's exclusion principle?AAn orbital can contain a maximum of two electronsBPaired electrons in one orbital have opposite spinsCDegenerate orbitals are singly occupied before pairingDNo two electrons have identical sets of four quantum numbers Like 0 Discuss 0Share