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 · Q96
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 · Q96

D and F Block Elements question

2014 · Q96

NEETChemistryD and F Block ElementsMCQ+4 / −1
The reaction of aqueous KMnO4 with H2O2 in acidic conditions gives
  1. A
    Mn4+ and O2
  2. B
    Mn2+ and O2
  3. C
    Mn2+ and O3
  4. D
    Mn4+ and MnO2
View written solutionFree

Correct answer: B

Hydrogen peroxide is oxidised to H2O and O2.

2KMnO4

  • 3H2SO4
  • 5H2O2 →\to→

                K2SO4
  • 2MnSO4
  • 8H2O + 5O2

    Thus, Mn2+ and O2 are produced.
PreviousNext

More from D and F Block Elements

  • 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
  • Which one of the following does not correctly represent the correct order of the property indicated against it?2012 · MCQ