JEE Main 2006Annual, Paper 1ChemistryEasyd- and f-Block Elements158× since 2002Lanthanoid contraction is caused due to :AOption A. the appreciable shielding on outer electrons by 4f electrons from the nuclear chargeBOption B. the appreciable shielding on outer electrons by 5d electrons from the nuclear chargeCOption C. the same effective nuclear charge from Ce to LuDOption D. the imperfect shielding on outer electrons by 4f electrons from the nuclear chargeCheckSkip · show solution
