Atomic Structure STBAtomic Structure MCQs (STB)#Atomic Structure#X-Rays66Choose the best answerWhich wavelength range corresponds best to X-rays?A4000–7000 ÅB0.1–10 ÅC1000–4000 ÅDGreater than 7000 Å Like 2 Discuss 0Share
GasesDeviation of Real Gases from Ideal Behaviour67Choose the best answerReal gases deviate from ideal behaviour mainly because:AGas molecules have zero volumeBNo intermolecular forces existCMolecules have finite volume and intermolecular forces existDTheir collisions are always inelastic Like 0 Discuss 0Share
Aldehydes and KetonesIodoform Test68Choose the best answerWhich compound does NOT give the iodoform test?ACH₃COCH₂COOC₂H₅BCH₃COCH₃CCH₃CH₂COCH₃DCH₃CH₂CH(OH)CH₂CH₃ Like 0 Discuss 0Share
StoichiometryMoles and Molar Mass69Choose the best answerWhich sample has the least mass?A0.5 mol O₂B2 mol NH₃C0.25 mol SO₂D0.5 mol H₂O Like 0 Discuss 0Share
Basic Concepts of ChemistryPhysical and Chemical Changes70Choose the best answerWhich of the following is a characteristic of a chemical change?AFormation of one or more new substancesBNo energy change can occurCChemical composition remains unchangedDOnly the physical state changes Like 0 Discuss 0Share