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Friday, 9 October

JEE Main 2021 · ChemistryNumerical answerNumerical valueEasyCalculation

JEE Main 25 July 2021, Shift 1, Chemistry Q54

Question 54 of 90 in this shift, Chemistry question 24 of 30, Section B.

The number of sigma bonds in H3C−C(H)=CH−C≡C−H\mathrm{H_3C-C(H)=CH-C\equiv C-H} (the H on the second carbon drawn below it) is ____________.

The figure, in words

Condensed structure H3C-C(=CH-C≡C-H) with an H drawn below the second carbon: CH3-CH=CH-C≡CH.

Official answer

10

NTA final key.

Chapter
Chemical Bonding and Molecular Structure
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.