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JEE Main 2026 · ChemistryMultiple choiceSingle correctMediumCalculation

JEE Main 2 April 2026, Shift 2, Chemistry Q62

Question 62 of 75 in this shift, Chemistry question 12 of 25, Section A.

Complete combustion of X g of an organic compound gave 0.25 g of

CO_2

and 0.12 g of

H_2O

. If the % of carbon is 25% and of hydrogen is 4.89%, then

X = \underline{\hspace{1cm}} \times 10^{-3}

g. (Nearest integer) (Molar mass of C, H and O are 12, 1 and 16 g mol

^{-1}

respectively.)

(1) $273$ Official answer
(2) $27$
(3) $2730$
(4) $227$

Official answer

Option 1

NTA final key.

Chapter: Some Basic Concepts of Chemistry
Topic: Stoichiometry
Idea tested: POAC in Combustion Analysis

Same idea in other shifts

Asked 2× in all

7 Apr 2025, Shift 1 · Q74An organic compound weighing 500 mg, produced 220 mg of $\mathrm{CO_2}$ , on complete combustion. The percentage composition of carbon in…EasyNumerical 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.