JEE Questions for Chemistry The D And F Block Elements Quiz 11 - MCQExams.com

The atomic numbers of V, Cr, Mn and Fe are respectively 23, 24, 25 and 26. which one of these may be expected to have the highest second ionization enthalpy ?
  • Cr
  • Mn
  • Fe
  • V
When MnO2 is fused with KOH, a coloured compound is formed. The product and its colour is
  • K2MnO4, purple green
  • KMnO4 purple
  • Mn2O3, brown
  • Mn2O4 black
The colourless species is
  • VCl3
  • VOSO4
  • Na3VO4
  • [V(H2O)6SO4].H2O

Chemistry-The d and f Block Elements-8479.png

  • Chemistry-The d and f Block Elements-8480.png
  • 2)
    Chemistry-The d and f Block Elements-8481.png

  • Chemistry-The d and f Block Elements-8482.png

  • Chemistry-The d and f Block Elements-8483.png
Equivalent weight of K2Cr2O7 in acidic medium is
  • M
  • M/2
  • M/6
  • M/5
The correct order of ionic radii of Y3+ , La3+, Eu3++ and Lu3+ is
  • Y3+ < La3+ < Eu3+ < Lu3+
  • Y3+ Lu3+ < Eu3+La3+
  • Lu3+ < Eu3+ < La3+ < Y3+
  • La3+ < Eu3+ < Lu3+ < Y3+
Iodide of Millon’s base is
  • HgI2
  • K2HgI4
  • NH2HgO.HgI
  • NH4I
Vanadyl ion is

  • Chemistry-The d and f Block Elements-8486.png
  • 2)
    Chemistry-The d and f Block Elements-8487.png

  • Chemistry-The d and f Block Elements-8488.png

  • Chemistry-The d and f Block Elements-8489.png
Out of Fe2+, Fe3+, Mn2+ and Ti2+, the least size is of
  • Mn2+
  • Ti2+
  • Fe2+
  • Fe3+
TiI4 on heating gives
  • TiI2 + I2
  • Ti + 2 I2
  • TiI3 + 1/2 I2
  • None of these
Mn2O7 dissolves in water to give an acid. The colour of the acid is
  • Green
  • Blue
  • Violet
  • Red
Among Sc (III), Ti (IV), Pd (II) and Cu (II) ions
  • All are paramagnetic
  • All are diamagnetic
  • Sc(III), Ti (IV) are paramagnetic and Pd (II), Cu(II) are diamagnetic
  • Sc (III) Ti (IV) are diamagnetic and Pd (II) Cu (III) are paramagnetic
“925 fine silver” means an alloy of
  • 7.5% Ag and 92.5% Cu
  • 92.5% Ag and 7.5% Cu
  • 80% Ag and 20% Cu
  • 90% Ag and 10% Cu
An aqueous solution of metal ion M1 reacts separately with reagents Q and R in excess to give tetrahedral and square planar complexes, respectively. An aqueous solution of another metal ion M2 always forms tetrahedral complexes with these reagents. Aqueous solution of M2 on reaction with reagent S gives white precipitate which dissolves in excess of S. The reactions are summarised in the scheme give below

Chemistry-The d and f Block Elements-8491.png
  • Zn2+ , KCN and HCl
  • Ni2+ , HCl and KCN
  • Cd2+ , KCN and HCl
  • Co2+ , HCl and KCN
An aqueous solution of metal ion M1 reacts separately with reagents Q and R in excess to give tetrahedral and square planar complexes, respectively. An aqueous solution of another metal ion M2 always forms tetrahedral complexes with these reagents. Aqueous solution of M2 on reaction with reagent S gives white precipitate which dissolves in excess of S. The reactions are summarised in the scheme give below

Chemistry-The d and f Block Elements-8492.png
  • K4[Fe(CN)6]
  • Na2 HPO4
  • K2 CrO4
  • KOH
Which of the following does not represent the correct order of the property indicated?
  • Sc3+ > Cr3+ > Fe3+ > Mn3+ — ionic radius
  • Sc < Ti < Cr < Mn — density
  • Mn > Ni2+ > Co2+ < Fe2+ — ionic radius
  • FeO < CaO < MnO < CuO — basic nature
The following two reactions HNO3 with Zn are given as (equations are not balanced)
I. Zn + conc.HNO3 → Zn (NO3)2 + X + H2O (A)
II. Zn + dil.HNO3 → Zn (NO3)2 + Y + H2O (B)
In reactions I and II, the compounds X and Y respectively, are
  • NO2 and NO
  • NO2 and NO2
  • NO and NO2
  • NO2 and NH4 NO3
Which one of the following reactions will occur on heating AgNO3 above its melting point ?
  • 2AgNO3 → 2Ag + 2NO2 + O2
  • 2AgNO3 → 2Ag + N2 + 3O2
  • 2AgNO3 → 2AgNO2 + O2
  • 2AgNO3 → 2Ag + 2NO + 2O2
  • 2AgNO3 → Ag2O + N2O3 + O2
What is the correct order of spin only magnetic moment (in BM) of Mn2+ , Cr2+ and V2+ ?
  • Mn2+ > V2+ > Cr2+
  • V2+ > Cr2+ > Mn2+
  • Mn2+ > Cr2+ > V2+
  • Cr2+ > V2+ > Mn2+
AgCl on fusion with Na2CO3 gives
  • Ag
  • Ag2CO3
  • Ag2O
  • Silver carbide
Amongst the following the lowest degree of paramagnetism per mole of the compound at 298o K will be shown by
  • MnSO4.4H2O
  • CuSO4.5H2O
  • FeSO4.6H2O
  • NiSO4.6H2O
Which of the following ions will finally give a black precipitate with Ag+ ion ?

  • Chemistry-The d and f Block Elements-8497.png
  • 2)
    Chemistry-The d and f Block Elements-8498.png

  • Chemistry-The d and f Block Elements-8499.png

  • Chemistry-The d and f Block Elements-8500.png
Potassium manganate (K2MnO4) is formed when
  • Chlorine is passed into aqueous KMnO4 solution
  • Manganese dioxide is fused with potassium hydroxide in air
  • Formaldehyde reacts with potassium permanganate in presence of strong alkali
  • Potassium permanganate reacts with concentrated sulphuric acid
The equivalent weight of KMnO4 (formula weight =M) when it is used as a an oxidant in neutral medium is
  • M
  • 2)
    Chemistry-The d and f Block Elements-8502.png

  • Chemistry-The d and f Block Elements-8503.png

  • Chemistry-The d and f Block Elements-8504.png
Compound that is both paramagnetic and coloured is
  • K2Cr2O7
  • (NH4)2[TiCl6]
  • VOSO4
  • K3[Cu(CN)4]
The number of moles of KMnO4 that will be needed to react completely with one mole of ferrous oxalate in acidic solution is

  • Chemistry-The d and f Block Elements-8506.png
  • 2)
    Chemistry-The d and f Block Elements-8507.png

  • Chemistry-The d and f Block Elements-8508.png
  • 1
The only cations present in a slightly acidic solution are Fe3+, Zn2+ and Cu2+. The reagent that when added in excess to this solution would identify and separate Fe3+ in one step is
  • 2 M HCl
  • 6 M NH3
  • 6 M NaOH
  • H2S gas
In nitroprusside ion, the iron and NO exist as FeII and NO+ rather than FeIII and NO. These forms can be differentiated by
  • Estimating the concentration of iron
  • Measuring the concentration of CN–
  • Measuring the solid state magnetic moment
  • Thermally decomposing the compound
Acidified solution of chromic acid on treatment with H2O2 gives blue colour which is due to
  • CrO3 + H2O + O2
  • Cr2O3 + H2O + O2
  • CrO5 + H2O
  • H2Cr2O7 + H2O + O2

Chemistry-The d and f Block Elements-8512.png
  • [ Fe(H2O)6]2+
  • [Fe(NO)(CN)5]2+
  • [Fe(H2O)5NO]2+
  • [Fe(H2O)(NO)5]2+
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