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

D and F Block Elements question

2021 · 25 Jul · Shift 1 · Q12
Guest · try one question or challengeGuest · try one question or challenge
  1. PYQ Library
  2. /JEE Main
  3. /Chemistry
  4. /D and F Block Elements
  5. /2021 · 25 Jul · Shift 1 · Q12

D and F Block Elements question

2021 · 25 Jul · Shift 1 · Q12

JEE MainChemistryD and F Block ElementsMCQ+4 / −1
The correct order of following 3d metal oxides, according to their oxidation numbers is : (a) CrO3CrO_3CrO3​, (b) Fe2O3Fe_2O_3Fe2​O3​, (c) MnO2MnO_2MnO2​, (d) V2O5V_2O_5V2​O5​, (e) Cu2OCu_2OCu2​O
  1. A
    (d) > (a) > (b) > (c) > (e)
  2. B
    (a) > (c) > (d) > (b) > (e)
  3. C
    (a) > (d) > (c) > (b) > (e)
  4. D
    (c) > (a) > (d) > (e) > (b)
PreviousNext

More from D and F Block Elements

  • Which one of the following metals forms interstitial hydride easily?2021 · MCQ
  • Number of electrons present in 4f orbital of Ho3+ ion is ​. (Given Atomic No. of Ho = 67)2021 · Numerical
  • The spin only magnetic moments (in BM) for free Ti3+, V2+ and Sc3+ ions respectively are : (At.No. Sc : 21, Ti : 22, V : 23)2021 · MCQ
  • The number of 4f electrons in the ground statement electronic configuration of Gd2+ is ​. [Atomic number of Gd = 64]2021 · Numerical
  • Which one of the following when dissolved in water gives coloured solution in nitrogen atmosphere?2021 · MCQ
  • Which one of the following lanthanoids does not form MO2​? [M is lanthanoid metal]2021 · MCQ
  • In mildly alkaline medium, thiosulphate ion is oxidized by MnO4−​ to "A". The oxidation state of sulphur in "A" is ​.2021 · Numerical
  • The number of f electrons in the ground state electronic configuration of Np (Z = 93) is ​. (Nearest integer)2021 · Numerical