Aldehydes and KetonesFehling's Test601Choose the best answerA positive Fehling's test is indicated by formation of:ASilver mirrorBBrick-red Cu₂O precipitateCYellow CHI₃ precipitateDWhite AgCl precipitate Like 0 Discuss 0Share
Chemical BondingHybridization602Choose 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 Equation603Choose 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#Radioactivity604Choose the best answerWhich radioactive emission has the greatest penetrating power?Aα particlesBβ particlesCγ raysDPositive rays Like 0 Discuss 0Share
Carboxylic AcidsHydrogen Bonding and Dimerization605Choose 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