JEE Main Chemistry · Solutions

Enthalpy of Solution and Hydration

Enthalpy of Solution and Hydration (Solutions) was asked 2 times in 2 JEE Main shifts, 2024–2025, out of the 42 shifts Lumi analysed. 1 of the 2 had a numerical answer.

Times asked: 2; in 2 shifts
Years: 2024–2025
Usual format: Numerical value; Calculation
Pattern: New since 2024; repeats across shifts

How it is asked

Heat of solution from lattice and hydration energies
Heat of hydration from heats of solution

Difficulty

Easy 2Medium 0Hard 0

Where it sits

Chapter: Solutions. Topic: Enthalpy and Hess's Law, 24 questions over 14 ideas.

All 2 questions

Newest first, each with its options and official answer.

7 Apr 2025, Shift 2 · Q53The hydration energies of $\mathrm{K^+}$ and $\mathrm{Cl^-}$ are $-x$ and $-y$ kJ/mol respectively. If lattice energy of KCl is $-z$ …EasySingle correct
9 Apr 2024, Shift 1 · Q83The heat of solution of anhydrous $\mathrm{CuSO_4}$ and $\mathrm{CuSO_4\cdot5H_2O}$ are $-70$ kJ mol $^{-1}$ and $+12$ kJ mol $^{-1}$ …EasyNumerical value