StoichiometryMole Concept and Number of Atoms741Choose the best answerWhat is the total number of atoms present in 6 g H₂O?ANAB2NAC3NAD(1/3)NA Like 0 Discuss 0Share
Atomic Structure STBAtomic Structure MCQs (STB)#Atomic Structure#Bohr Model742Choose the best answerThe relation r = a₀n²/Z applies to:AMulti-electron atoms onlyBHydrogen and hydrogen-like speciesCCovalent molecules onlyDRadioactive elements only Like 0 Discuss 0Share
Atomic StructureEnergy of Electron in Bohr Orbit743Choose the best answerIn a Bohr orbit, the magnitude of the kinetic energy of an electron is:AHalf the magnitude of its potential energyBTwice the magnitude of its potential energyCOne-fourth the magnitude of its potential energyDEqual to zero Like 0 Discuss 0Share
ElectrochemistryStandard Hydrogen Electrode744Choose the best answerWhich statement is NOT correct for the standard hydrogen electrode?APlatinum black is used on the Pt electrodeBThe standard temperature is commonly taken as 298 KCA 1 M H₂SO₄ solution is specifically requiredDIt is used as a reference for measuring electrode potentials Like 0 Discuss 0Share
Aldehydes and KetonesDehydrogenation of Alcohols745Choose the best answerTertiary alcohols do not undergo normal dehydrogenation to carbonyl compounds over heated copper because:AThey are readily oxidized.BThey lack an α-hydrogen on the carbon bearing –OH.CThey lack every β-hydrogen.DThey do not contain an –OH group. Like 0 Discuss 0Share