JEE Questions for Chemistry The D And F Block Elements Quiz 10 - MCQExams.com

(n –d10 ns2 is the general electronic configuration of
  • Fe , Co , Ni
  • Cu, Ag, Au
  • Zn, Cd, Hg
  • Se, Y, La
Which of the following does not give a precipitate with excess of NaOH ?
  • HgCl2
  • AgNO3
  • FeSO4
  • ZnSO4
Which of the following does not react with AgCl?
  • Na2S2O3
  • NH4OH
  • NaNO3
  • Na2CO3
Which of the following compound is not coloured ?
  • Na2CuCl4
  • Na2CdCl4
  • K4Fe(CN)6
  • K3Fe(CN)6
Which of the following compounds is expected to be coloured
  • Ag2SO4
  • CuF2
  • MgF2
  • CuCl
The number of moles of KMnO4 that will be needed to react with one mole of sulphite ion in acidic medium is

  • Chemistry-The d and f Block Elements-8455.png
  • 2)
    Chemistry-The d and f Block Elements-8456.png

  • Chemistry-The d and f Block Elements-8457.png
  • 1
The electronic configuration of gadolinium (At. No.is
  • [Xe ] 4f8 5d1 6s2
  • [Xe] 4f7 5d1 6s2
  • [Xe] 4 f3 5 d5 6s2
  • [Xe] 4f6 5d2 6s2
The 3d – series starts from
  • Z = 21 – 30
  • Z = 22 – 30
  • Z = 20 – 30
  • Z = 31 – 40
A white solid halide of mercury forms a black mixture with NH4OH.The halide is
  • HgCl2
  • HgI2
  • Hg2I2
  • Hg2Cl2
In the dichromate dianion
  • 4 Cr – O bonds are equivalent
  • 6 Cr – O bonds are equivalent
  • All Cr – O bonds are equivalent
  • All Cr – O bonds are non - equivalent
The chemical processes in the production of steel from haematite ore involve
  • Reduction
  • Oxidation
  • Reduction followed by oxidation
  • Oxidation followed by reduction
The compound that is soluble in water
  • AgF
  • AgCl
  • AgBr
  • AgI
Which of the following gives blood red colour with KCNS?
  • Cu2+
  • Fe3+
  • Al3+
  • Zn2+
In the chemical reaction Ag2O + H2O + 2e− → 2Ag + 2OH–
  • Water is oxidized
  • Electrons are reduced
  • Silver is oxidized
  • Silver is reduced
  • Hydrogen is reduced
Amongst the following, identify the species with an atom in +6 oxidation state

  • Chemistry-The d and f Block Elements-8464.png
  • 2)
    Chemistry-The d and f Block Elements-8465.png

  • Chemistry-The d and f Block Elements-8466.png

  • Chemistry-The d and f Block Elements-8467.png
The element with electronic configuration of its atom 1s2 2s2 2p6 3s2 3p6 3d10 4s1 is
  • Fe
  • Co
  • Ni
  • Zn
  • Cu
In the preparation of KMnO4, pyrolusit (MnO2) is first converted to potassium manganate (K2MnO4). In this conversion, the oxidation state of manganese changes from
  • + 1 to + 3
  • + 2 to + 4
  • + 3 to + 5
  • + 4 to + 6
  • + 5 to + 7
Transition metal with low oxidation number will act as
  • A base
  • An acid
  • An oxidising agent
  • None of these
The reason for the stability of Gd3+ ion is
  • 4f sub shell – half filled
  • 4f sub shell- completely filled
  • Possesses the general electronic configuration of noble gases
  • 4f sub shell empty
The black compound formed during the reaction between sodium thiosulphate and silver nitrate is
  • Silver thiosulphate (Ag2S2O3)
  • Silver sulphide (Ag2S)
  • Silver sulphate (Ag2SO4)
  • Silver sulphite (Ag2SO3)
Zn gives H2 gas with H2SO4 and HCl but not with HNO3 because
  • Zn acts as an oxidising agent when reacts with HNO3
  • HNO3 is weaker acid than H2SO4 and HCl
  • In electrochemical series Zn is above hydrogen

  • Chemistry-The d and f Block Elements-8469.png
Choose the correct reaction to prepare mercurous chloride (calomel)

  • Chemistry-The d and f Block Elements-8494.png
  • Hg + Cl2 →
  • HgCl2 + SnCl2 →
  • Both (and (3)

Chemistry-The d and f Block Elements-8470.png
  • Na2ZnO2
  • 2NaZnO2
  • Zn(OH)2
  • None of these
Colourless solutions of the following four salts are placed separately in four different test tubes and a strip of copper is dipped in each one of these, which solution will turn blue ?
  • KNO3
  • AgNO3
  • Zn(NO3)2
  • ZnSO4
General electronic configuration of lanthanides is

  • Chemistry-The d and f Block Elements-8471.png
  • 2)
    Chemistry-The d and f Block Elements-8472.png

  • Chemistry-The d and f Block Elements-8473.png

  • Chemistry-The d and f Block Elements-8474.png
An atom has electronic configuration1s2 2s2 2p6 3s2 3p6 3d3 4s2 . In which group would it be placed?
  • Fifth
  • Fifteenth
  • Second
  • Third
In acidic medium, KMnO4 oxidises FeSO4 solution. Which of the following statement is correct?
  • 10 ml of 1 N KMnO4 solution oxidizes 10ml of 5 N FeSO4 solution
  • 10 ml of 1 M KMnO4 solution oxidises 10 ml of 5M FeSO4 solution
  • 10 ml of 1 M KMnO4 solution oxidizes 10 ml of 1 M FeSO4 solution
  • 10 ml of 1N KMnO4 solution oxidizes 10 ml of 0.1 M FeSO4 solution
Arrange Ce3+, La3+ Pm3+ and Yb3+ increasing order of their ionic radii
  • Yb3+ < Pm3+ < Ce3+ < La3+
  • Ce3+ < Yb3+ < Pm3+ < La3+
  • Yb3+ < Pm3+ < La3+ < Ce3+
  • Pm3+ < La3+ < Ce3+ < Yb3+
Which of the following reaction is possible at anode ?

  • Chemistry-The d and f Block Elements-8475.png
  • 2)
    Chemistry-The d and f Block Elements-8476.png

  • Chemistry-The d and f Block Elements-8477.png
  • None of these
The radius of La3+(At. No of La =is 1.06Å given values will be closest to the radius of Lu3+ (At. No. of Lu = 71)? A which one of the following
  • 1.40Å
  • 1.06Å
  • 0.85Å
  • 1.60Å
0:0:1


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