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Saturday, 31 October

JEE Main 2021 · ChemistryMultiple choiceSingle correctEasyRecall

JEE Main 25 February 2021, Shift 1, Chemistry Q50

Question 50 of 90 in this shift, Chemistry question 20 of 30, Section A.

Which of the glycosidic linkage between galactose and glucose is present in lactose ?
  1. (1)C-1 of galactose and C-4 of glucoseOfficial answer
  2. (2)C-1 of galactose and C-6 of glucose
  3. (3)C-1 of glucose and C-4 of galactose
  4. (4)C-1 of glucose and C-6 of galactose

Official answer

Option 1

NTA final key.

Chapter
Biomolecules
Topic
Carbohydrates
Idea tested
Lactose Structure and Linkage

Same idea in other shifts

Asked 2× in all
  1. 6 Sep 2020, Shift 2 · Q26Which one of the following statements is not true ?MediumSingle 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.