Doubts
Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents
Sign in to save progress →
Doubts
Sign in

Periodic Table and Periodicity question

2020 · 9 Jan · Shift 1 · Q9
Guest · try one question or challengeGuest · try one question or challenge
  1. PYQ Library
  2. /JEE Main
  3. /Chemistry
  4. /Periodic Table and Periodicity
  5. /2020 · 9 Jan · Shift 1 · Q9

Periodic Table and Periodicity question

2020 · 9 Jan · Shift 1 · Q9

JEE MainChemistryPeriodic Table and PeriodicityMCQ+4 / −1
The electronic configurations of bivalent europium and trivalent cerium are (atomic number : Xe = 54, Ce = 58, Eu = 63)
  1. A
    [Xe] 4f7 6s2 and [Xe] 4f2 6s2
  2. B
    [Xe] 4f2 and [Xe] 4f7
  3. C
    [Xe] 4f4 and [Xe] 4f9
  4. D
    [Xe] 4f7 and [Xe] 4f1
PreviousNext

More from Periodic Table and Periodicity

  • The first and second ionisation enthalpies of a metal are 496 and 4560 kJ mol–1, respectively. How many moles of HCl and H2​SO4​, respectively, will be needed to react completely with 1 mole of the metal hydroxide ?2020 · MCQ
  • The lathanide ion that would show colour is :2019 · MCQ
  • The size of the iso-electronic species Cl−, Ar and Ca2+ is affected by :2019 · MCQ
  • The IUPAC symbol for the element with atomic number 119 would be :2019 · MCQ
  • The element having greatest difference between its first and second ionization energies, is :2019 · MCQ
  • Aluminium is usually found in +3 oxidation state. In contrast, thallium exists in + 1 and + 3 oxidation states. This is due to :2019 · MCQ
  • In general, the properties that decrease and increase down a group in the periodic table, respectively, are :2019 · MCQ
  • When the first electron gain enthalpy (Δeg​H) of oxygen is − 141 kJ/mol, its second electron gain enthalpy is :2019 · MCQ