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

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


Write applications of co-ordination compounds in medicine and electroplating.


Following compounds are given to you :

2-Bromopentane, 2-Bromo-2-methylbutane, 1-Bromopentane

1) Write the compound which is most reactive towards SN2 reaction.

2) Write the compound which is optically active.

3)  Write the compound which is most reactive towards β-elimination reaction. 


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


The coordination number of Cr in [Cr(NH3)3(H2O)3]Cl3 is ___________.


When 0.1 mol \[\ce{CoCl3 (NH3)5}\] is treated with excess of \[\ce{AgNO3}\], 0.2 mol of \[\ce{AgCl}\] are obtained. The conductivity of solution will correspond to ______.


The stabilisation of coordination compounds due to chelation is called the chelate effect. Which of the following is the most stable complex species?


Which of the following complexes are homoleptic?

(i) \[\ce{[Co(NH3)6]^{3+}}\]

(ii) \[\ce{[Co(NH3)4 Cl2]^{+}}\]

(iii) \[\ce{[Ni(CN)4]^{2-}}\]

(iv) \[\ce{[Ni(NH3)4Cl2]}\]


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


Which one of the following does not achieve an octet of electrons in the central atom?


Oxidation number of carbon in CH2Cl2 is


The complex which has no d electrons in the central atom is:-


Given below are two statements.

Statement I: In CuSO4·5H2O, Cu-O bonds are present.

Statement II: In CuSO4·5H2O, ligands coordinating with Cu(II) ion are O- and S-based ligands.

In light of the above statement, choose the correct answer from the options given below.


Does ionization isomer for the following compound exist? Justify your answer.

\[\ce{Hg[Co(SCN)4]}\]


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


Explain the following, giving two examples:

Coordination number


Explain the following, giving two examples: 

Homoleptic


Give two examples of ambidentate ligands.


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