GasesIdeal Behaviour of Helium921Choose the best answerHelium behaves very nearly as an ideal gas because:AIt has strong intermolecular attractionsBIts atoms have very large volumeCIt has a high boiling pointDIntermolecular attractions between He atoms are very weak Like 0 Discuss 0Share
GasesAverage Kinetic Energy of Gases922Choose the best answerAt 298 K, the average kinetic energy of a He atom compared with that of an H₂ molecule is:ATwice as largeBThe sameCHalf as largeDFour times as large Like 0 Discuss 0Share
SINDH MDCAT 2019 CHEMISTRY#Hydrogen Isotopes#Isotopes923Choose the best answerTritium, an isotope of hydrogen contains: (Sindh MDCAT 2019)AEqual number of electrons and neutronsBEqual number of electrons, protons and neutronsCNumber of neutrons are double than the number of protonsDNumber of neutrons are half than the number of protons Like 0 Discuss 0Share
Atomic StructureAzimuthal Quantum Number and Angular Momentum924Choose the best answerThe azimuthal quantum number, ℓ, is directly related to the electron's:AElectric chargeBSpin onlyCOrbital angular momentumDNuclear mass Like 0 Discuss 0Share
SolidsProperties of Ionic Solids925Choose the best answerIonic solids are brittle because:AThey contain free electronsBDisplacement of ionic layers brings like charges together, causing repulsionCThey have very low melting pointsDTheir ions are neutral Like 0 Discuss 0Share