मराठी
कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

Assertion: Cr(HX2O)X6]ClX2 and [Fe(HX2O)X6]ClX2 are reducing in nature. Reason: Unpaired electrons are present in their d-orbitals.

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प्रश्न

Assertion: \[\ce{Cr(H2O)6]Cl2 and [Fe(H2O)6]Cl2}\] are reducing in nature.

Reason: Unpaired electrons are present in their d-orbitals.

पर्याय

  • Assertion and reason both are true, reason is correct explanation of assertion.

  • Assertion and reason both are true but reason is not the correct explanation of assertion.

  • Assertion is true, reason is false.

  • Assertion is false, reason is true.

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उत्तर

Assertion and reason both are true but reason is not the correct explanation of assertion.

Explanation:

In the complexes, \[\ce{Co}\] exists as \[\ce{Co^{2+}}\] and \[\ce{Fe}\] as \[\ce{Fe^{2+}}\]. Both of the complexes becomes stable by oxidation of metal ion to \[\ce{Co^{3+}}\] and \[\ce{Fe^{3+}}\].

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पाठ 9: Coordination Compounds - Exercises [पृष्ठ १२७]

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एनसीईआरटी एक्झांप्लर Chemistry Exemplar [English] Class 12
पाठ 9 Coordination Compounds
Exercises | Q V. 42. | पृष्ठ १२७

संबंधित प्रश्‍न

Give the oxidation state, d-orbital occupation and coordination number of the central metal ion in the following complex:

[Mn(H2O)6]SO4


IUPAC name of the following compound is

(a) 3 - Bromo- 3, 4- dimethylheptane

(b) 3, 4- dimethyl - 3- bromoheptane

(c) 5- Bromo- 4, 5- dimethylheptane

(d) 4, 5- dimethyl- 5- bromoheptane


How is Benzonitrile converted to Benzophenone?


Write IUPAC name of the following Complex [Cr(NH3)3Cl3]


Write the IUPAC name of the following coordination compound:

[PtCl2(NH3)4][PtCl4]


Write structures of compounds A and B of the following reaction : 


Ligand (en) is an example of ___________.


A complex of the type \[\ce{[M(AA)2X2]^{n+}}\] is known to be optically active. What does this indicate about the structure of the complex? Give one example of such complex.


Match the complex ions given in Column I with the colours given in Column II and assign the correct code:

Column I (Complex ion) Column II (Colour)
A. \[\ce{[Co(NH3)6]^{3+}}\] 1. Violet
B. \[\ce{[Ti(H2O)6]^{3+}}\] 2. Green
C. \[\ce{[Ni(H2O)6]^{2+}}\] 3. Pale blue
D. \[\ce{(Ni(H2O)4 (en)]^{2+} (aq)}\] 4. Yellowish orange
  5. Blue

Oxidation number of cobalt in K[Co(CO)4] is


Which one of the following ligands forms a chelate?


Ethylene diamine tetraacetate (EDTA) ion is ______.


The correct order of the spin-only magnetic moment of metal ions in the following low spin complexes,

\[\ce{[V(CN)6]^{4-}, [Fe(CN)6]^{4-}, [Ru(NH3)6]^{3+} and [Cr(NH3)6]^2}\] is:


What is a chelate complex?


Assertion (A): EDTA is a hexadentate ligand.

Reason (R): EDTA has 2 nitrogen and 4 oxygen donor atoms.


What is meant by the chelate effect? Give an example.


Explain the following, giving two examples: 

Heteroleptic


Give two examples of unidentate ligands.


Give two examples of didentate ligands.


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