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JEE Main 2026 · ChemistryMultiple choiceSingle correctEasyCalculation

JEE Main 5 April 2026, Shift 1, Chemistry Q51

Question 51 of 75 in this shift, Chemistry question 1 of 25, Section A.

How many grams of residue is obtained by heating 2.76 g of silver carbonate? (Given : Molar mass of C, O and Ag are 12, 16 and 108 g mol

^{-1}

respectively)

(1)1.08 g
(2)2.16 gOfficial answer
(3)3.24 g
(4)4.32 g

Official answer

Option 2

NTA final key.

Chapter: Some Basic Concepts of Chemistry
Topic: Stoichiometry
Idea tested: Stoichiometry of Thermal Decomposition

Same idea in other shifts

Asked 2× in all

4 Aug 2021, Shift 2 · Q51The amount of potassium chlorate ( $\mathrm{KClO_3}$ ) that needs to be completely decomposed in order to liberate 40 $\mathrm{dm^3}$ of…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 108 of the 174 JEE Main shifts held from 2017 to 2026.