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A molecule, AX, has a vibrat ional energy of 1000 cm–1 and rotational energy of 10 cm–1. Another molecule, BX, has a vibrat ional energy of 400 cm–1 and rotational energy of 40 cm–1. Which one of the following statements about the coupling of vibrational and rotational motion is true:
  • a)
    The coupling is stronger in BX.
  • b)
    The coupling is stronger in AX.
  • c)
    Magnitude of coupling is same in both AX and BX.
  • d)
    There is no coupling in both AX and BX
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
A molecule, AX, has a vibrat ional energy of 1000 cm–1 and rotat...
Answer:

Introduction:
In molecules, vibrational and rotational motion are coupled due to the interaction between the vibrational and rotational energy levels. The strength of this coupling depends on the difference in energy between the vibrational and rotational states. In this case, we are comparing two molecules, AX and BX, based on their vibrational and rotational energy levels.

Explanation:
To determine which molecule has a stronger coupling between vibrational and rotational motion, we need to compare the energy differences between their vibrational and rotational states.

AX:
- Vibrational energy = 1000 cm^(-1)
- Rotational energy = 10 cm^(-1)

The energy difference between the vibrational and rotational states in AX is 1000 cm^(-1) - 10 cm^(-1) = 990 cm^(-1).

BX:
- Vibrational energy = 400 cm^(-1)
- Rotational energy = 40 cm^(-1)

The energy difference between the vibrational and rotational states in BX is 400 cm^(-1) - 40 cm^(-1) = 360 cm^(-1).

Comparison:
- The energy difference between the vibrational and rotational states in AX (990 cm^(-1)) is larger than that in BX (360 cm^(-1)).
- The larger the energy difference, the stronger the coupling between vibrational and rotational motion.

Conclusion:
Based on the energy differences between the vibrational and rotational states, we can conclude that the coupling between vibrational and rotational motion is stronger in molecule BX compared to molecule AX.
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Community Answer
A molecule, AX, has a vibrat ional energy of 1000 cm–1 and rotat...
I think coupling is related to spin of spieces and spin is nothing but rotation.So more rotational energy more coupling.
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A molecule, AX, has a vibrat ional energy of 1000 cm–1 and rotational energy of 10 cm–1. Another molecule, BX, has a vibrat ional energy of 400 cm–1 and rotational energy of 40 cm–1. Which one of the following statements about the coupling of vibrational and rotational motion is true:a)The coupling is stronger in BX.b)The coupling is stronger in AX.c)Magnitude of coupling is same in both AX and BX.d)There is no coupling in both AX and BXCorrect answer is option 'A'. Can you explain this answer?
Question Description
A molecule, AX, has a vibrat ional energy of 1000 cm–1 and rotational energy of 10 cm–1. Another molecule, BX, has a vibrat ional energy of 400 cm–1 and rotational energy of 40 cm–1. Which one of the following statements about the coupling of vibrational and rotational motion is true:a)The coupling is stronger in BX.b)The coupling is stronger in AX.c)Magnitude of coupling is same in both AX and BX.d)There is no coupling in both AX and BXCorrect answer is option 'A'. Can you explain this answer? for IIT JAM 2024 is part of IIT JAM preparation. The Question and answers have been prepared according to the IIT JAM exam syllabus. Information about A molecule, AX, has a vibrat ional energy of 1000 cm–1 and rotational energy of 10 cm–1. Another molecule, BX, has a vibrat ional energy of 400 cm–1 and rotational energy of 40 cm–1. Which one of the following statements about the coupling of vibrational and rotational motion is true:a)The coupling is stronger in BX.b)The coupling is stronger in AX.c)Magnitude of coupling is same in both AX and BX.d)There is no coupling in both AX and BXCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for IIT JAM 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A molecule, AX, has a vibrat ional energy of 1000 cm–1 and rotational energy of 10 cm–1. Another molecule, BX, has a vibrat ional energy of 400 cm–1 and rotational energy of 40 cm–1. Which one of the following statements about the coupling of vibrational and rotational motion is true:a)The coupling is stronger in BX.b)The coupling is stronger in AX.c)Magnitude of coupling is same in both AX and BX.d)There is no coupling in both AX and BXCorrect answer is option 'A'. Can you explain this answer?.
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