Learn

Saturday, 31 October

JEE Main 2022 · ChemistryNumerical answerNumerical valueEasyCalculation

JEE Main 27 July 2022, Shift 2, Chemistry Q90

Question 90 of 90 in this shift, Chemistry question 30 of 30, Section B.

In the above reaction, 5 g of toluene is converted into benzaldehyde with 92% yield. The amount of benzaldehyde produced is __________ ×10−2\times10^{-2} g. (Nearest integer) [figure: toluene (CH3 on benzene ring), 5 g, arrow to benzaldehyde (CHO on benzene ring), (92%)]

The figure, in words

Reaction scheme: toluene (5 g) to benzaldehyde (92%).

Official answer

530

NTA final key.

Chapter
Some Basic Concepts of Chemistry
Topic
Stoichiometry
Idea tested
Theoretical and Percent Yield

Same idea in other shifts

Asked 7× in all
  1. 29 Jul 2022, Shift 1 · Q89In bromination of Propyne, with Bromine 1, 1, 2, 2-tetrabromopropane is obtained in 27% yield. The amount of 1, 1, 2, 2-tetrabromopropane…MediumNumerical value
  2. 24 Feb 2021, Shift 2 · Q601.86 g of aniline completely reacts to form acetanilide. 10% of the product is lost during purification. Amount of acetanilide obtained…EasyNumerical value
  3. 22 Jul 2021, Shift 2 · Q60Methylation of 10 g of benzene gave 9.2 g of toluene. Calculate the percentage yield of toluene ________. (Nearest integer)EasyNumerical value
  4. 17 Mar 2021, Shift 1 · Q60[reaction drawn: see figure_note] In the above reaction, 3.9 g of benzene on nitration gives 4.92 g of nitrobenzene. The percentage yield…EasyNumerical valueHas a figure
  5. 17 Mar 2021, Shift 2 · Q60[reaction scheme] Consider the above reaction. The percentage yield of amide product is __________. (Round off to the Nearest Integer).…MediumNumerical valueHas a figure
  6. 18 Mar 2021, Shift 2 · Q59[figure: reaction scheme] Consider the above reaction where 6.1 g of Benzoic acid is used to get 7.8 g of m-bromo benzoic acid. The…EasyNumerical valueHas a figure

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 108 of the 174 JEE Main shifts held from 2017 to 2026.