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Which of the following facts about the complex [Cr(NH3)6]CI3 is wrong?
(AIEEE 2011)
  • a)
    The complex involves d2sp3 hybridisation and is octahedral in shape
  • b)
    The complex is paramagnetic
  • c)
    The complex is an outer orbital complex
  • d)
    The complex gives white precipitate with silver nitrate solution  
Correct answer is option 'C'. Can you explain this answer?
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Which of the following facts about the complex [Cr(NH3)6]CI3 is wrong?...



The outer orbital electronic configuration of Cr is 3d3 4s°.
The orbital diagram is represented in the figure
Here,indicates lone-pair of NH3 donated to Cr.
(a) d2sp3-hybridisation , octahedral. Thus, correct.
(b) There are three unpaired electrons, hence paramagnetic Thus, correct.
(c) d2sp3-inner orbital complex , thus in correct.
(d) Due to ionisable Cl- ions, white precipitate with AgNO3, thus correct.
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Most Upvoted Answer
Which of the following facts about the complex [Cr(NH3)6]CI3 is wrong?...
Explanation:

Incorrect Statement:
The complex [Cr(NH3)6]Cl3 is not an outer orbital complex. It is an inner orbital complex.

Correct Statements:
- Hybridisation and Shape: The complex involves d2sp3 hybridisation, where the 4s, 3d, and two 4p orbitals of chromium combine to form six sp3d2 hybrid orbitals. These orbitals arrange themselves in an octahedral shape around the central chromium atom.
- Paramagnetic Nature: The complex is paramagnetic due to the presence of unpaired electrons in the d-orbitals of the chromium atom, making it attracted to a magnetic field.
- White Precipitate Formation: The complex does give a white precipitate with silver nitrate solution. This reaction is used to confirm the presence of the chloride ion in the complex.
In conclusion, the incorrect statement is that the complex [Cr(NH3)6]Cl3 is an outer orbital complex. It is actually an inner orbital complex due to the involvement of the d-orbitals of the central chromium atom.
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When a transition metal ion (usually) is involved in octahedral complex formation, the five degenerate d-orbitals split into two set of degenerate orbitals (3 + 2). Three degenerate orbitals of lower energy (dxy, dyz, dzx) and a set of degenerate orbitals of higher energy (dx2 y2and dz2). The orbitals with lower energy are called t2gorbitals and those with higher energy are called egorbitals.In octahedral complexes, positive metal ion may be considered to be present at the centre and negative ligands at the corner of a regular octahedron. As lobes ofandlie along the axes, i.e., along the ligands the repulsions are more and so high is the energy. The lobes of the remaining three d-orbitals lie between the axes. i.e., between the ligands. The repulsion between them are less, so lesser the energy. In the octahedral complexes, if metal ion has electrons more than 3 then for pairing them the option are(i) Pairing may start with 4thelectron in t2gorbitals.(ii) Pairing may start normally with 6thelectrons when t2gand egorbitals are singly filled.Q. Select incorrect match for the following complexes.

Which of the following facts about the complex [Cr(NH3)6]CI3 is wrong?(AIEEE2011)a)The complex involves d2sp3hybridisation and is octahedral in shapeb)The complex isparamagneticc)The complex is an outer orbital complexd)The complex gives white precipitate with silver nitrate solutionCorrect answer is option 'C'. Can you explain this answer?
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Which of the following facts about the complex [Cr(NH3)6]CI3 is wrong?(AIEEE2011)a)The complex involves d2sp3hybridisation and is octahedral in shapeb)The complex isparamagneticc)The complex is an outer orbital complexd)The complex gives white precipitate with silver nitrate solutionCorrect answer is option 'C'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Which of the following facts about the complex [Cr(NH3)6]CI3 is wrong?(AIEEE2011)a)The complex involves d2sp3hybridisation and is octahedral in shapeb)The complex isparamagneticc)The complex is an outer orbital complexd)The complex gives white precipitate with silver nitrate solutionCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following facts about the complex [Cr(NH3)6]CI3 is wrong?(AIEEE2011)a)The complex involves d2sp3hybridisation and is octahedral in shapeb)The complex isparamagneticc)The complex is an outer orbital complexd)The complex gives white precipitate with silver nitrate solutionCorrect answer is option 'C'. Can you explain this answer?.
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