Question

Which of the following is correct for the rotational spectrum of a diatomic molecule?
(A) The spectrum consists of equally spaced lines
W
(B) The distance between the lines is equal to 2B
(C) The space between the lines depend on the molecule
(D) All the options are correct
Answer
А
B
с
Submit
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BI
O
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Answer 1

Answer:

Option a is correct

Explanation:

The rotation of a diatomic molecule can be described by the rigid rotor model.

Answer 2

The correct option is D.

• For a diatomic molecule, the lines of the rotational spectrum are equally spaced.
• These equally spaced lines have a constant separation of 2B. Where B is the rotational constant.
• If we change the molecule and the system exists no longer rigid then the space between the lines also change. As the molecule changes the spacing between the lines decreases.