Chapter 11 Multiple choice questions

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. Consider the following assertions that concern the behaviour of the ¹⁶O₂ molecule. Which one of these is correct?

Only odd rotational states exist correct incorrect

Only even rotational states exist. correct incorrect

Both odd and even rotational states will exist, but not with equal probabilities. correct incorrect

At T/K=0, ¹⁶O₂ has only vibrational energy. correct incorrect

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. This question is concerned with the effect of nuclear spin on rotational states of nitrogen molecules.
The ¹⁴N atom has nuclear spin I=1, ¹⁵N has nuclear spin I=1/2.
The molecular ground state of N₂ is
Which one of the following statements is true?

¹⁴N₂ has only even rotational states correct incorrect

¹⁴N₂ has only odd rotational states correct incorrect

¹⁴N₂ has both even and odd rotational states in a ratio of 2:1 correct incorrect

¹⁵N₂ has even and odd rotational states in a ratio of 3:1 correct incorrect

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