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.

MCQ
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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

Explain the following, giving two examples:

Coordination entity


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


Write IUPAC names of the following compounds:


Write structures of compounds A, B and C in of the following reactions


Write the IUPAC name of the following complex:

[Co(NH3)5(CO3)]Cl


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


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 coordination compounds given in Column I with the central metal atoms given in Column II and assign the correct code:

Column I (Coordination Compound) Column II (Central metal atom)
A. Chlorophyll 1. rhodium
B. Blood pigment 2. cobalt
C. Wilkinson catalyst 3. calcium
D. Vitamin B12 4. iron
  5. magnesium

What is the relationship between observed colour of the complex and the wavelength of light absorbed by the complex?


The oxidation state of Fe in the brown ring complex [F3(H2O)5NO]SO4 is


Why chelate complexes are more stable than complexes with unidentate ligands?


The equivalents of ethylene diamine required to replace the neutral ligands from the coordination sphere of the trans-complex of CoCl3.4NH3 is ______. (Round off to the Nearest Integer).


Is the central metal atom in coordination complexes a Lewis acid or a Lewis base? Explain.


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


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


Explain with two examples of the following:

Ligand


Give two examples of didentate ligands.


Statement I: [Co(NH3)6]3+ is a homoleptic compleх whereas [Co(NH3)4Cl2]+ is a heteroleptic complex.

Statement II: Complex [Co(NH3)6]3+ has only one kind of ligands but [Co(NH3)4Cl2]+ has more than one kind of ligands.

In the light of the above statements, Choose the correct answer form the options given below.


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