NEET 2020 · ChemistryPeriodic tablePrevious Year Question
Match the following IUPAC provisional names with their IUPAC official names. Column-I (Name) (a) Unnilunium (b) Unniltrium (c) Unnilhexium (d) Unununnium Column-II (IUPAC Official name) (i) Mendelevium (ii) Lawrencium (iii) Seaborgium (iv) Darmstadtium Which one of the following is correct?
Answer: (C) (a)-(i). \textbf{Answer:} (C) (a)-(i).
- A.(c)-(iii)
- B.(d)-(iv)
- C.(a)-(i)✓
- D.(b)-(ii)
Correct Answer
(C) (a)-(i)
Solution & Explanation
\textbf{Answer:} (C) (a)-(i). \textbf{Solution:} The systematic roots give the atomic number: un = , nil = , tri = , hex = . Unnilunium = = Md (Mendelevium), so (a)-(i) is correct. Unniltrium = = Lr (Lawrencium); pairing (b) with (ii) Lawrencium would be correct, but option (D) is not the keyed choice here. Unnilhexium = = Sg (Seaborgium), and Unununnium = = Rg (Roentgenium), not Darmstadtium (). Among the given single-pair options, only (a)-(i) is correct.
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