Chemical BondingHybridization646Choose the best answerThe hybridization of the central atoms in CO₂, BF₃ and NH₄⁺ is respectively:Asp, sp², sp³Bsp², sp, sp³Csp, sp³, sp²Dsp², sp³, sp Like 0 Discuss 0Share
SINDH MDCAT 2019 CHEMISTRY#Gases#Ideal Gas Equation647Choose the best answerThe value of R (the gas constant) is: (Sindh MDCAT 2019)A0.0821 dm³ atm K mole⁻¹B803143 Nm K⁻¹ moleC0.0821 dm³ atm K⁻¹ mole⁻¹D8.3143 dm³ atm K⁻¹ mole⁻¹ Like 0 Discuss 0Share
Atomic Structure STBAtomic Structure MCQs (STB)#Penetrating Power#Radioactivity648Choose the best answerWhich radioactive emission has the greatest penetrating power?Aα particlesBβ particlesCγ raysDPositive rays Like 0 Discuss 0Share
Carboxylic AcidsHydrogen Bonding and Dimerization649Choose the best answerAcetic acid exists as a dimer in benzene because of:ACondensationBThe presence of the –COOH group onlyCThe presence of α-hydrogen atomsDIntermolecular hydrogen bonding Like 0 Discuss 0Share
LiquidsEvaporation650Choose the best answerEvaporation of a liquid can occur:AOnly above its boiling pointBOnly at 100°CCOnly at 0°CDAt all temperatures at which the liquid exists Like 0 Discuss 0Share