NEET Chemistry - New - d and f-Block Elements

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Question - 1

Pick out the correct statement with respect to [Mn(CN)6]3-

  • A It is sp3d2 hybridised and octahedral
  • B It is sp3d2 hybridised and tetrahedral
  • C It is d2sp3 hybridised and octahedral
  • D It is dsp2 hybridised and square planar

Question - 2

Which of the following processes does not involve oxidation of iron?

  • A Rusting of iron sheets
  • B Decolourisation of blue CuSO4 solution by iron
  • C Formation of Fe(CO)5 from Fe
  • D Liberation of H2 from steam by iron at a high temperature.

Question - 3

Magnetic moment 2.84 B.M. is given by : Atomic number Ni = 28, Ti = 22, Cr = 24, Co = 27)

  • A Ni+2
  • B Ti+3
  • C Cr3+
  • D Co+2

Question - 4

The angular moment of electrons in d-orbital is equal to:

  • A \(\sqrt { 6 } \hslash \)
  • B \(\sqrt { 2 } \hslash \)
  • C \(2\sqrt { 3 } \hslash \)
  • D \(0\hslash \)

Question - 5

The pair of compounds that can exist together is :

  • A FeCl3.SnCl2
  • B HgCl2.SnCl2
  • C FeCl2.SnCl2
  • D FeCl3,KI

Question - 6

The d-electron configurations of C2+, Mn2+ Fe2+ and CO2+ are d4, d5, d6 and d7 respectively. Which one of the following will exhibit minimum paramagnetic behaviour?(At. no. Cr = 24, Mn = 25, Fe = 26, Co = 2)

  • A [Fe(H2O)6]2+
  • B [Co(H2O)6]2+
  • C [Cr(H2O)6]2+
  • D [Mn(H2O)6]2+

Question - 7

For the four successive transition elements (Cr, Mn, Fe and Co), the stability of +2 oxidation state will be there in which of the following order? (Atomic number Cr = 24, Mn = 25, Fe =26, Co = 27)

  • A Fe > Mn > Co > Cr
  • B Co > Mn > Fe > Cr
  • C Cr > Mn > Co > Fe
  • D Mn > Fe > Cr > Co

Question - 8

Which one of the following ions has electronic configuration [Ar] 3d6 ? (Atomic number Mn = 25, Fe = 26, Co = 27, Ni = 28)

  • A Ni3+
  • B Mn3+
  • C Fe3+
  • D CO3+

Question - 9

Which one of the following ions is the most stable in aqueous solution? (Atomic number Ti = 22,Y = 23, Cr = 24,Mn = 25)

  • A Cr3+
  • B V3+
  • C Ti3+
  • D Mn3+

Question - 10

In which of the following pairs are both the ions coloured in aqueous solution? (Atomic number Sc = 21,Ti = 22,Ni = 28,Cu = 29, Co = 27)

  • A Ni2+, Ti3+
  • B Sc3+, Ti3+
  • C Sc3+, CO2+
  • D Ni2+, Cu+