Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents

Your guest activity stays on this device

Sign in to save progress →
Sign in

D and F Block Elements question

2014 · Q95
Guest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.
  1. PYQ Library
  2. /NEET
  3. /Chemistry
  4. /D and F Block Elements
  5. /2014 · Q95

D and F Block Elements question

2014 · Q95

NEETChemistryD and F Block ElementsMCQ+4 / −1
Magnetic moment 2.83 BM is given by which of the following ions?
(At. nos. Ti = 22, Cr = 24, Mn = 25, Ni = 28)
  1. A
    Ti3+
  2. B
    Ni2+
  3. C
    Cr3+
  4. D
    Mn2+
View written solutionFree

Correct answer: B

Magnetic moment (μ\mu μ) = n(n+2)\sqrt {n\left( {n + 2} \right)} n(n+2)​

For μ\mu μ = 2.84

2.84 = n(n+2)\sqrt {n\left( {n + 2} \right)} n(n+2)​

⇒\Rightarrow⇒ n = 2

Cr2+ – [Ar]3d44s0 , 4 unpaired electrons

Co2+ – [Ar]3d74s0 , 3 unpaired electrons

Ni2+ – [Ar]3d8 4s0 , 2 unpaired electrons

Ti3+ – [Ar]3d14s0 , 1 unpaired electron

PreviousNext

More from D and F Block Elements

  • The reaction of aqueous KMnO4 with H2O2 in acidic conditions gives2014 · MCQ
  • Reason of lanthanoid contraction is2014 · MCQ
  • Sc (Z = 21) is a transition element but Zn (Z = 30) is not because2013 · MCQ
  • Which of the following lanthanoid ions is diamagnetic? (At. nos. Ce = 58, Sm = 62, Eu = 63, Yb = 70)2013 · MCQ
  • Which of the following statements about the interstitial compounds is incorrect?2013 · MCQ
  • The catalytic activity of transition metals and their compounds is ascribed mainly to2012 · MCQ
  • Four successive members of the first series of the transition metals are listed below. For which one of them the standard potential (EM2+/Mo​) value has a positive sign?2012 · MCQ
  • Which of the following exhibits only + 3 oxidation state?2012 · MCQ