GasesCritical Temperature and Liquefaction826Choose the best answerArgon has a critical temperature of 157 K. Which temperature is below its critical temperature?A160 KB170 KC200 KD155 K Like 0 Discuss 0Share
Chemical KineticsInstantaneous and Average Rate827Choose the best answerWhich statement is false?AFor a typical reaction whose rate decreases with time, the initial instantaneous rate is high.BThe activated complex has a very short lifetime.CA tangent to a concentration–time curve gives the average rate.DOnly a fraction of molecular collisions are effective. Like 0 Discuss 0Share
Chemical BondingMolecular Geometry and Polarity828Choose the best answerH₂S has a net dipole moment whereas BeF₂ has zero dipole moment because:AH₂S is linear and BeF₂ is bentBH₂S is bent while BeF₂ is linearCSulfur is more electronegative than fluorineDBe is more electronegative than sulfur Like 0 Discuss 0Share
Sindh MDCAT 2021 Chemistry#Passivation of Aluminium#S- and P-Block Elements829Choose the best answerAluminium does not react with:AH₂SO₄BH₃PO₄CHNO₃DHCl Like 0 Discuss 0Share
LiquidsLondon Dispersion Forces830Choose the best answerThe force of attraction between helium atoms is mainly:AHydrogen bondingBCovalent bondingCDipole–dipole attractionDLondon dispersion force Like 0 Discuss 0Share