The atomic number of cobalt is 27. The EAN of cobalt in Na3[CoNO2

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 Multiple Choice QuestionsMultiple Choice Questions

131.

In which of the following complex ion, the central metal ion is in a state of sp3d2 hybridisation?

  • [CoF6]3-

  • [Co(NH3)6]3+

  • [Fe(CN)6]3-

  • [Cr(NH3)6]3+


132.

Which of the following can participate in linkage isomerism?

  • NO2-

  • H2N··CH2CH2N··H2

  • H2O

  • :NH3


133.

IUPAC name of Na3[Co(NO2)6] is

  • sodium hexanitrito cobaltate (II)

  • sodium hexanitro cobaltate (III)

  • sodium hexanitrito cobaltate (III)

  • sodium cobaltnitrite


134.

A complex compound in which the oxidation number of a metal is zero is

  • K4[Fe(CN)6]

  • K3[Fe(CN)6]

  • [Ni(CO)4]

  • [Pt(NH3)4]Cl2


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135.

Which complex cannot ionise in solution?

  • [CoCl3(NH3)3]

  • K4[Fe(CN)6]

  • K2[Pt(F6)]

  • [Pt(NH3)6]Cl4


136.

The IUPAC name of [Co(NH3)5ONO]2+ ion is

  • penta ammine nitrito cobalt (IV) ion

  • penta ammine nitrito cobalt (III) ion

  • penta ammine nitro cobalt (III) ion

  • penta ammine nitro cobalt (IV) ion


137.

The IUPAC name of K2[Ni(CN)4] is

  • potassium tetracyanonickelate (II)

  • potassium tetracyanatonickelate (III)

  • potassium tetracyanatonickel (II)

  • potassium tetracyanonickel (III)


138.

The IUPAC name of the complex [Co(NH3)4Cl2]Cl is

  • dichloro tetraammine cobalt (III) chloride

  • tetraammine dichloro cobalt (III) chloride

  • tetraammine dichloro cobalt (II) chloride

  • tetraammine dichloro cobalt (IV) chloride


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139.

Which one of the following is wrongly matched?

  • [Cu(NH3)4]2+  - Square planar

  • [Ni(CO)4]   - Netural ligand

  • [Fe(CN6)3-]  -  sp3d2

  • [Co(en)3]3+    - Follows EAN


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140.

The atomic number of cobalt is 27. The EAN of cobalt in Na3[CoNO2)4Cl2] is

  • 24

  • 36

  • 34

  • 35


B.

36

EAN of Co in Na3[Co(NO2)4Cl2] = Atomic number of Co± oxidation state of Co + number of e- taken from -NO2 and -Cl

= 27 + 3 + (4 + 2) = 36


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