LiquidsIntermolecular Forces816Choose the best answerWhich statement is incorrect?AGraphite layers are held together by weak van der Waals forcesBGreater polarizability generally strengthens London forcesCBoiling points of noble gases generally increase down the groupDThe unusually high boiling point of water is mainly due to ordinary London forces Like 0 Discuss 0Share
Chemical BondingBond Energy817Choose the best answerWhich statement about bond energy is correct?ASi–Si is stronger than C–CBN–N single bond is stronger than N≡NCN≡N has much greater bond energy than F–FDF–F has greater bond energy than N≡N Like 0 Discuss 0Share
MDCAT Chemistry Past Paper 2023#Atomic Structure#Isoelectronic Species818Choose the best answerWhich of the following is different in Na⁺ (Z = 11), Mg²⁺ (Z = 12) and Al³⁺ (Z = 13)? (MDCAT 2023)ANumber of shellsBNumber of electronsCElectronic configurationDNumber of protons Like 0 Discuss 0Share
SolidsRadius Ratio Rule819Choose the best answerRadius ratio is mainly useful for predicting the:AColour of an ionic solidBCoordination number and geometry of an ionic crystalCMelting point of every solidDSolubility of every ionic compound Like 0 Discuss 0Share
Chemistry of HydrocarbonsFree-Radical Halogenation of Alkanes820Choose the best answerWhich reaction is a propagation step in the chlorination of methane?ACl₂ → 2Cl•BCH₄ + Cl• → CH₃• + HClCCl• + Cl• → Cl₂DCH₃• + CH₃• → C₂H₆ Like 1 Discuss 0Share