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Which of the following statements is/are incorrect?
A. The complex ion trans-dichloro bis (ethylenediamine) rhodium(III) is optically active.
B. Secondary valancies are non-directional, whereas primary valencies are directional.
C. Both geometrical and optical types of isomerism are shown by [Co(en)2Cl2]+.
  • a)
    Only A
  • b)
    Only B
  • c)
    Only A and B
  • d)
    Only C
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
Which of the following statements is/are incorrect?A. The complex ion ...
  • This option is correct because both the statements A and B are incorrect.
  • Trans-dichloro bis (ethylenediamine) rhodium(III) is symmetrical and therefore, is optically inactive.
  • According to Werner's theory, secondary valency is directional, whereas primary valency is non-directional.
  • Geometrical isomers are possible for [Co(en)2Cl2]+ and the cis isomer is optically active.
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Community Answer
Which of the following statements is/are incorrect?A. The complex ion ...
Incorrect Statements in Coordination Chemistry

A. Incorrect Statement: The complex ion trans-dichloro bis (ethylenediamine) rhodium(III) is optically active.
Explanation: The given statement is incorrect. The complex ion trans-dichloro bis (ethylenediamine) rhodium(III) is optically inactive due to geometrical isomerism.

B. Incorrect Statement: Secondary valencies are non-directional, whereas primary valencies are directional.
Explanation: The given statement is incorrect. Primary valencies are non-directional, whereas secondary valencies are directional.

C. Correct Statement: Both geometrical and optical types of isomerism are shown by [Co(en)2Cl2].
Explanation: The given statement is correct. The complex [Co(en)2Cl2] shows geometrical isomerism due to the presence of two different ligands (en and Cl) and optical isomerism due to the presence of a chiral center (Co) and the absence of a plane of symmetry.

Therefore, option C is the correct answer.
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Which of the following statements is/are incorrect?A. The complex ion trans-dichloro bis (ethylenediamine) rhodium(III) is optically active.B. Secondary valancies are non-directional, whereas primary valencies are directional.C. Both geometrical and optical types of isomerism are shown by [Co(en)2Cl2]+.a)Only Ab)Only Bc)Only A and Bd)Only CCorrect answer is option 'C'. Can you explain this answer?
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