Enthalpies (Bond, Combustion, Formation…): JEE Questions & Solutions
8 previous-year JEE Chemistry questions on Enthalpies (Bond, Combustion, Formation…), each with a worked step-by-step solution.
Previous-year questions
- 01
Consider the following data: f H^ ( methane, g) = -X kJ mol^-1 Enthalpy of sublimation of graphite = Y kJ mol^-1 Dissociation enthalpy of…
MCQMediumJEE 2026 - 02
The heat of atomisation of methane and ethane are x kJ mol^-1 and y kJ mol^-1 respectively. The longest wavelength () of light capable of…
MCQMediumJEE 2026 - 03
The formation enthalpies, Hf^ for H2 and O2 are 220.0 kJ mol^-1 and 250.0 kJ mol^-1, respectively, at 298.15 K, and Hf^ for H2 O (g) is…
NVAEasyJEE 2025 - 04
Consider the following data: - Heat of formation of CO2(g) = -393.5 kJ mol^-1 - Heat of formation of H2O(l) = -286.0 kJ mol^-1 - Heat of…
NVAEasyJEE 2025 - 05
Given: Hf^0 [C( graphite)] = 710 kJ mol^-1 c H^0 = 414 kJ mol^-1 H-H^0 = 436 kJ mol^-1 C-H^0 = 611 kJ mol^-1 The HC=C^0 for CH2= CH2 is kJ…
NVAMediumJEE 2025 - 06
28.0 L of CO2 is produced on complete combustion of 16.8 L gaseous mixture of ethene and methane at 25^ C and 1 atm. Heat evolved during…
NVAMediumJEE 2023 - 07
The number of endothermic process/es from the following is: A. I2 (g) 2 I (g) B. HCl (g) H (g) + Cl (g) C. H2 O (l) H2 O (g) D. C (s) + O2…
NVAEasyJEE 2023 - 08
Solid fuel used in rocket is a mixture of Fe2O3 and Al (in ratio 1: 2) the heat evolved (KJ) per gram of the mixture is (Nearest integer)…
MCQMediumJEE 2023
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