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JEE Main 2026 · ChemistryNumerical answerNumerical valueEasyCalculation

JEE Main 2 April 2026, Shift 1, Chemistry Q73

Question 73 of 75 in this shift, Chemistry question 23 of 25, Section B.

One mole of an alkane (x) requires

8

mole oxygen for complete combustion. Sum of number of carbon and hydrogen atoms in the alkane (x) is __________.

Official answer

17

NTA final key.

Chapter: Hydrocarbons
Topic: Alkanes and Free Radicals
Idea tested: General Stoichiometry of Alkane Combustion

Same idea in other shifts

Asked 2× in all

6 Apr 2026, Shift 2 · Q72An alkane (Y) requires 8 moles of oxygen for complete combustion and on chlorination with $\mathrm{Cl_2}/h\nu$ , (Y) gives only one…MediumNumerical value

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