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Saturday, 31 October

JEE Main 2022 · ChemistryNumerical answerNumerical valueMediumCalculation

JEE Main 29 July 2022, Shift 1, Chemistry Q84

Question 84 of 90 in this shift, Chemistry question 24 of 30, Section B.

When 600 mL of 0.2 M HNO3\mathrm{HNO_3} is mixed with 400 mL of 0.1 M NaOH solution in a flask, the rise in temperature of the flask is __________ ×10−2\times10^{-2} °C. (Enthalpy of neutralisation = 57 kJ mol−1\mathrm{mol^{-1}} and Specific heat of water = 4.2 JK−1 g−1\mathrm{JK^{-1}\ g^{-1}}) (Neglect heat capacity of flask)

Official answer

54

NTA final key.

Chapter
Thermodynamics (Chemistry)
Topic
Enthalpy and Hess's Law
Idea tested
Constant Enthalpy of Neutralization

Same idea in other shifts

Asked 3× in all
  1. 5 Apr 2024, Shift 1 · Q72Given below are two statements : One is labelled as Assertion (A) and the other is labelled as Reason (R) Assertion (A) : Enthalpy of…EasyAssertion–reason
  2. 27 Aug 2021, Shift 1 · Q52200 mL of 0.2 M HCl is mixed with 300 mL of 0.1 M NaOH. The molar heat of neutralization of this reaction is −57.1-57.1 kJ. The increase in…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.