Atomic StructureHydrogen Spectrum and Balmer Series1461Choose the best answerIn the Balmer series of hydrogen, which transition produces the third spectral line?An = 5 → n = 2Bn = 5 → n = 1Cn = 4 → n = 2Dn = 4 → n = 1 Like 0 Discuss 0Share
Stoichiometry#Atomic Structure#Isotopes1462Choose the best answerWho introduced the concept of isotopes?ABerzeliusBJ.J ThomsonCSoddyDAbraham Like 0 Discuss 0Share
Carboxylic AcidsPreparation of Acyl Chlorides1463Choose the best answerAcetic acid reacts with SOCl₂ to form:AAcetaldehydeBAcetyl chlorideCAcetic anhydrideDEthyl acetate Like 0 Discuss 0Share
Gasesvan der Waals Constant a1464Choose the best answerThe van der Waals constant a for O₂, N₂, NH₃ and CH₄ is given as 1.360, 1.390, 1.370 and 1.350, respectively. Based only on these values, which gas has the strongest intermolecular attraction?AO₂BN₂CNH₃DCH₄ Like 0 Discuss 0Share
Sindh MDCAT 2021 Chemistry#Ores of Aluminium#S- and P-Block Elements1465Choose the best answerDiaspore is an ore of:ACopperBZincCIronDAluminium Like 0 Discuss 0Share