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

2005 · Q100
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. /2005 · Q100

D and F Block Elements question

2005 · Q100

NEETChemistryD and F Block ElementsMCQ+4 / −1
The number of moles of KMnO4 reduced by one mole of KI in alkaline medium is
  1. A
    one
  2. B
    two
  3. C
    five
  4. D
    one fifth
View written solutionFree

Correct answer: B

The chemical reactions involved in this case are as follows :

KI + H2O →\to→ KOH + HI

2KMnO4 + 2KOH → 2K2MnO4 + H2O + [O]

Thus, for overall reaction, two moles of KMnO4 are reduced by two moles of KOH or KI. Hence, one mole of KI is required to reduce one mole of KMnO4.

PreviousNext

More from D and F Block Elements

  • The aqueous solution containing which one of the following ions will be colourless? (Atomic number : Sc = 21, Fe = 26, Ti = 22, Mn = 25)2005 · MCQ
  • Four successive members of the first row transition elements are listed below with their atomic numbers. Which one of them is expected to have the highest third ionisation enthalpy?2005 · MCQ
  • More number of oxidation states are exhibited by the actinoids than by the lanthanoids. The main reason for this is2005 · MCQ
  • lanthanoids are2004 · MCQ
  • Among the following series of transition metal ions, the one where all metal ions have 3d2 electronic configuration is [At. Nos. Ti = 22, V = 23, Cr = 24, Mn = 25]2004 · MCQ
  • Which one of the following characteristics of the transition metals is associated with their catalytic activity?2003 · MCQ
  • The basic character of the transition metal monoxides follows the order (Atomic no's. Ti = 22, V = 23, Cr = 24, Fe = 26)2003 · MCQ
  • The correct order of ionic radii of Y3+, La3+, Eu3+ and Lu3+ is (Atomic nos. Y = 39, La = 57, Eu = 63, Lu = 71)2003 · MCQ