Learn

Saturday, 31 October

JEE Main 2025 · ChemistryNumerical answerNumerical valueEasyCalculation

JEE Main 7 April 2025, Shift 2, Chemistry Q71

Question 71 of 75 in this shift, Chemistry question 21 of 25, Section B.

Butane reacts with oxygen to produce carbon dioxide and water following the equation given below. C4H10(g)+132O2(g)→4CO2(g)+5H2O(l)\mathrm{C_4H_{10}(g)+\frac{13}{2}O_2(g)\rightarrow 4CO_2(g)+5H_2O(\mathit{l})} If 174.0 kg of butane is mixed with 320.0 kg of O2\mathrm{O_2}, the volume of water formed in liters is __________. (Nearest integer) [Given : (a) Molar mass of C, H, O are 12, 1, 16 g mol−1^{-1} respectively, (b) Density of water = 1 g mL−1^{-1}]

Official answer

138

NTA final key.

Chapter
Some Basic Concepts of Chemistry
Topic
Stoichiometry
Idea tested
Limiting Reagent Identification

Same idea in other shifts

Asked 8× in all
  1. 5 Apr 2026, Shift 2 · Q51What volume of hydrogen gas at STP would be liberated by action of 50 mL of H2SO4\mathrm{H_2SO_4} of 50% purity (density = 1.3 g mL−1^{-1})…MediumSingle correct
  2. 2 Apr 2025, Shift 1 · Q51CaCO3(s)+2HCl(aq)→CaCl2(aq)+CO2(g)+H2O(l)\mathrm{CaCO_3(s)+2HCl(aq)\rightarrow CaCl_2(aq)+CO_2(g)+H_2O(l)} Consider the above reaction, what mass of CaCl2\mathrm{CaCl_2} will be…MediumSingle correct
  3. 29 Jul 2022, Shift 1 · Q62N2(g)+3H2(g)⇌2NH3(g)\mathrm{N_{2(g)}+3H_{2(g)} \rightleftharpoons 2NH_{3(g)}} 20 g 5 g Consider the above reaction, the limiting reagent of the reaction and…EasySingle correct
  4. 29 Jun 2022, Shift 1 · Q61Production of iron in blast furnace follows the following equation Fe3O4(s)+4CO(g)→3Fe(l)+4CO2(g)\mathrm{Fe_3O_4(s) + 4CO(g) \rightarrow 3Fe(l) + 4CO_2(g)} when 4.640…EasySingle correct
  5. 30 Jun 2022, Shift 1 · Q81Blister copper is produced by reaction of copper oxide with copper sulphide.…MediumNumerical value
  6. 27 Aug 2021, Shift 2 · Q51100 g of propane is completely reacted with 1000 g of oxygen. The mole fraction of carbon dioxide in the resulting mixture is…MediumNumerical value
  7. 16 Mar 2021, Shift 2 · Q51When 35 mL of 0.15 M lead nitrate solution is mixed with 20 mL of 0.12 M chromic sulphate solution, ________ ×10−5\times10^{-5} moles of lead…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 108 of the 174 JEE Main shifts held from 2017 to 2026.