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Friday, 9 October

NEET UG 2017 · Chemistry · Question 48

NEET 2017 Chemistry, question 48

Question 48 of the NEET 2017 paper (code A) is a Chemistry question from The d- and f-Block Elements. Its idea, Mercury(II) Halide Complexes, was asked only this once in NEET 2017–2026. The CBSE official answer key gives option 3.

Updated 2026-10-08

Q48 · Chemistry

HgCl2\mathrm{HgCl_2} and I2\mathrm{I_2} both when dissolved in water containing I−\mathrm{I^-} ions the pair of species formed is :

  1. 1HgI2\mathrm{HgI_2}, I3−\mathrm{I_3^-}
  2. 2HgI2\mathrm{HgI_2}, I−\mathrm{I^-}
  3. 3HgI42−\mathrm{HgI_4^{2-}}, I3−\mathrm{I_3^-}Official answer
  4. 4Hg2I2\mathrm{Hg_2I_2}, I−\mathrm{I^-}

Official answer: option 3 · CBSE official answer key

Same idea

The only question on Mercury(II) Halide Complexes

No other NEET paper from 2017–2026 tested this exact idea.

Mercury(II) Halide Complexes: every question and how it was framed

The chapter

The d- and f-Block Elements in ten years of NEET

21 questions from 2017–2026, asked in 10 of 10 papers, about 2.0 a paper. d- and f-Block Elements alone had 21.

Chapter analysisStudy this chapterPractise this chapter

The d- and f-Block Elements: questions per paper

0242’172’181’192’202’212’222’233’242’253’26