AIIMS 2018 Chemistry Stability of Complexes Assertion Reason Question
Assertion: [Co(NH₃)₆]³⁺ and [Co(en)₃]³⁺ are more stable complex. Reason: They are low spin complex.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Correct Answer
Detailed Explanation
Option B is correct because both [Co(NH₃)₆]³⁺ and [Co(en)₃]³⁺ are indeed stable complexes due to their low spin configurations, which result from the pairing of electrons in the presence of strong field ligands like NH₃ and ethylenediamine (en). However, the assertion that they are more stable is not solely explained by being low spin; other factors such as steric effects and chelation in [Co(en)₃]³⁺ also contribute to their stability.
Option A is incorrect because, while both statements are true, the reason does not fully explain the assertion. Option C is wrong since the assertion is true, but the reason is also true. Option D is incorrect because both the assertion and reason are valid statements about the complexes.
Found an issue with this question?
Related Questions
More from Coordination Compounds
More from 2018
Calculate the emf of the cell in which of the following reaction takes place Ni(s) + 2Ag⁺(0.002M) ⟶ Ni²⁺(0.160M) + 2Ag(s) Given that E°cell = 1.05V
Which of the following logic gate has only one input and one output?
A person aiming to reach the exactly opposite point on the bank of a stream is swimming with a speed of 0.5 m/s at an angle of 120° with the direction...