Learn

Friday, 9 October

JEE Main 2020 · ChemistryMultiple choiceDiagram basedMediumCalculation

JEE Main 2 September 2020, Shift 1, Chemistry Q40

Question 40 of 75 in this shift, Chemistry question 15 of 25.

In Carius method of estimation of halogen, 0.172 g of an organic compound showed presence of 0.08 g of bromine. Which of these is the correct structure of the compound ?

The figure, in words

Options 1 and 2 are benzene-ring structures (4-bromoaniline; 2,4-dibromoaniline).
  1. (1)[figure: 4-bromoaniline, benzene ring with NH2 and Br para]Official answer
  2. (2)[figure: 2,4-dibromoaniline, benzene ring with NH2, Br ortho and Br para to it]
  3. (3)H3C−Br\mathrm{H_3C-Br}
  4. (4)H3C−CH2−Br\mathrm{H_3C-CH_2-Br}

Official answer

Option 1

NTA final key (Sep 2020).

Chapter
Organic Chemistry: Some Basic Principles and Techniques
Topic
No close match in our taxonomy
Idea tested
No close match in our taxonomy

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. This question needs a figure we do not reproduce; it is described in words above. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.