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Saturday, 31 October

JEE Main 2021 · ChemistryMultiple choiceSingle correctEasyConceptual

JEE Main 26 August 2021, Shift 1, Chemistry Q39

Question 39 of 90 in this shift, Chemistry question 9 of 30, Section A.

Which one of the following when dissolved in water gives coloured solution in nitrogen atmosphere ?
  1. (1)ZnCl2\mathrm{ZnCl_2}
  2. (2)CuCl2\mathrm{CuCl_2}Official answer
  3. (3)Cu2Cl2\mathrm{Cu_2Cl_2}
  4. (4)AgCl

Official answer

Option 2

NTA final key.

Chapter
The d- and f-Block Elements
Topic
d-Block Elements
Idea tested
Color and Catalysis

Same idea in other shifts

Asked 7× in all
  1. 8 Apr 2026, Shift 2 · Q60Given below are two statements : Statement I : The number of pairs among [Ti4+,V2+][\mathrm{Ti^{4+}, V^{2+}}], [V2+,Mn2+][\mathrm{V^{2+}, Mn^{2+}}],…MediumTwo statements
  2. 1 Feb 2024, Shift 2 · Q71Which of the following compounds show colour due to d-d transition ?EasySingle correct
  3. 29 Jul 2022, Shift 1 · Q69In following pairs, the one in which both transition metal ions are colourless is :EasySingle correct
  4. 30 Jul 2022, Shift 2 · Q58The number of coloured and paramagnetic ions from the following in aqueous solution are ________. Ti3+\mathrm{Ti^{3+}}, Co2+\mathrm{Co^{2+}},…MediumNumerical value
  5. 3 Aug 2021, Shift 2 · Q38Which one of the following set will give coloured aqueous solution?EasySingle correct
  6. 4 Aug 2021, Shift 2 · Q37Ruby and emerald are coloured due to the presence ofEasySingle correct

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.