Q45 · CSIR NET Chemistry, June 2013
Paper: CSIR NET June 2013 · Subject: Inorganic Chemistry · Chapter: Inorganic Spectroscopy · Topic: Inorganic Spectroscopy – General · Marks: 2 · Difficulty: Easy
Among the following, those can act as Mössbauer muclei are
\[ \begin{array}{ll} \text{(A) } {}^{129}\mathrm{I} & \text{(B) } {}^{57}\mathrm{Co} \\ \text{(C) } {}^{57}\mathrm{Fe} & \text{(D) } {}^{121}\mathrm{Sb} \end{array} \]
(a)A, B, C and D
(b)B, C and D only
(c)A, B, and D only
(d)A, C and D only
Answer
Answer: D ✓ checked by 4AB · confidence high
The source book printed no answer; this one was worked out and checked — see the explanation.
Explanation
¹²⁹I, ⁵⁷Fe and ¹²¹Sb all have low-lying nuclear excited states used in Mössbauer spectroscopy. ⁵⁷Co is only the radioactive source that decays to the ⁵⁷Fe excited state, not a Mössbauer nucleus itself.
Study loop for Inorganic Spectroscopy