JEE Questions for Chemistry The D And F Block Elements Quiz 9 - MCQExams.com

The oxidation state of Cr in K2Cr2O7 is
  • + 5
  • + 3
  • + 6
  • + 7
A blue colouration is not obtained when
  • Ammonium hydroxide dissolve in copper sulphate
  • Copper sulphate solution reacts with K4[Fe(CN)6]
  • Ferric chloride reacts with sod. Ferrocyanide
  • Anhydrous CuSO4 is dissolved in water
The correct ground state electronic configuration of chromium atom (Z =is
  • [Ar] 4d5 4s1
  • [Ar] 3d4 4s2
  • [Ar] 3d6 4so
  • [Ar] 3d5 4s1
The electronic configuration of four elements are given below. Which element does not belong to the same family as others?
  • [Xe] 4f14 5d10 6s2
  • [Kr] 4d10 5s2
  • [Ne] 3s2 3p5
  • [Ar] 3d10 4s2
The aqueous solution of the following salts will be coloured in the case of
  • Zn (NO3)2
  • LiNO3
  • Co(NO3)2
  • Potash alum
Which of the following compounds is formed when a mixture of K2Cr2O7 and NaCl is heated with conc. H2SO4?
  • CrO2Cl2
  • CrCl3
  • Cr2(SO4)3
  • Na2CrO4

Chemistry-The d and f Block Elements-8436.png
  • An acidic medium
  • A basic medium
  • A neutral medium
  • It does not exist
Sodium thiosulphate is used in photography because of its
  • Oxidising behaviour
  • Reducing behaviour
  • Complexing behaviour
  • Photochemical behaviour
In the manufacture of iron from haematite, limestone is added to act as
  • Flux
  • A reducing agent
  • Slag
  • An oxidising agent
AgCl precipitate dissolve in NH4OH due to the formation of
  • [Ag (NH4)2] Cl
  • [Ag(NH4)4]Cl
  • [Ag(NH3)2]OH
  • [Ag(NH3)2]Cl
Identify the statement which is not correct regarding copper sulphate ?
  • It reacts with KI to give I2
  • It reacts with KCl to give Cu2Cl2
  • It reacts with NaOH and glucose to give Cu2O
  • It gives CuO on strong heating in air
Copper sulphate solution reacts with KCN to give
  • Cu(CN)2
  • CuCN
  • K2[Cu(CN)4]
  • K3[Cu(CN)4]
Mohr’s salt is
  • FeSO4.7H2O
  • Fe(NH4).SO4.6H2O
  • (NH4)2SO4. FeSO4.6H2O
  • [Fe(NH4)2] [ (SO4)2. 6H2O
Nessler’s reagent is
  • K2HgI4
  • K2HgI4+ KOH
  • K2HgI2 + KOH
  • K2HgI4 + Hg
The most durable metal palting on iron to protect against corrosion is
  • Nickel plating
  • Tin Plating
  • Copper plating
  • Zinc plating
The products of reaction of copper with dilute nitric acid are
  • Cu(NO3)2 + H2
  • Cu(NO3)2 +NO + H2O
  • Cu(NO3)2 + H2O + NO2
  • CuNO3 + H2
The shape of [Cu(H2O)6]2+ is
  • Distorted tetrahedral
  • Distorted pentagonal
  • Octahedral
  • Distorted octahedral
Which of the following arrangements does not represent the correct order of the property stated against it?
  • V2+ < Cr2+ < Mn2+ < Fe2+ (paramagnetic behaviour)
  • Ni2+ < Co2+ < Fe2+ < Mn2+ (ionic size)
  • Co3+ < Fe3+ < Cr3+ < Sc3+ (stability in aqueous solution)
  • Sc < Ti < Cr < Mn (number of oxidation states)
Which one of the following shows highest magnetic moment?
  • V3+
  • Cr3+
  • Fe3+
  • CO3+
When ( NH4)2Cr2O7 is heated, the gas evolved is
  • N2
  • NO2
  • O2
  • N2O
Noble metals are soluble in
  • NH4OH
  • Aqua Regin
  • H2SO4
  • Water gas
Which one of the following compounds does not decolourise an acidified aqueous solution of KMnO4?
  • Sulphur dioxide
  • Ferric chloride
  • Hydrogen peroxide
  • Ferrous sulphate
Turnbull’s blue is a compound called?
  • Ferricyanide
  • Ferrous ferrocyanide
  • Ferrous cyanide
  • Ferri – ferrocyanide
When Cu reacts with AgNO3 solution, the reaction takes place is
  • Oxidation of Cu
  • Reduction of Cu
  • Oxidation of Ag+

  • Chemistry-The d and f Block Elements-8443.png
Which of the following ions having following electronic structure would have maximum magnetic moment?
  • 1s2 2s2 2p6 3s2 3p6 3d3
  • 1s2 2s2 2p6 3s2 3p6 3d5
  • 1s2 2s2 2p6 3s2 3p6 3d7
  • 1s2 2s2 2p6 3s2 3p6 3d9
The colour of CuCr2O7 solution in water is green because ?

  • Chemistry-The d and f Block Elements-8444.png
  • Cu2+ ions are green
  • Both ions are green

  • Chemistry-The d and f Block Elements-8445.png
Mercury is the only metal which is liquid at 0oC This is due to its
  • Very high ionization energy and weak metallic bond
  • Low ionization potential
  • High atomic weight
  • High vapour pressure

Chemistry-The d and f Block Elements-8447.png

  • Chemistry-The d and f Block Elements-8448.png
  • 2)
    Chemistry-The d and f Block Elements-8449.png

  • Chemistry-The d and f Block Elements-8450.png

  • Chemistry-The d and f Block Elements-8451.png
Horn silver ore dissolve in excess of sodium cyanide solution forming
  • AgCN
  • Na[Ag(CN)2]
  • Na2[Ag(CN)3]
  • Na4[Ag(CN)5]
The stating material for the manufacture of KMnO4 is
  • Pyrolusite
  • Manganite
  • Magnatile
  • Haematite
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