NEET Chemistry
Enthalpy Internal Energy
Low Priority
Consistency: 25%
Weightage: 5 / 20 Yrs
High-Yield Trend
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2025 1
2023 1
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2012 1
2011 Questions 5 MCQs
01
PYQ 2011
easy
chemistry ID: neet-201
Given the following reaction:
→
The enthalpy change for the reaction is -869.6 kJ. The dissociation energy of the H-H bond is:
1. -869.6 kJ
2. +434.8kJ
3. +217.4kJ
4. -434.8 kJ
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02
PYQ 2012
easy
chemistry ID: neet-201
The standard enthalpy of vaporization for water at 100 oC is 40.66 kJ mol–1. The internal energy of vaporization of water at 100 oC (in kJ mol–1) is:
(Assume water vapour behaves like an ideal gas.)
| 1. | +37.56 | 2. | –43.76 |
| 3. | +43.76 | 4. | +40.66 |
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03
PYQ 2021
easy
chemistry ID: neet-202
For a reaction AB, enthalpy of reaction isΒ Β Β and enthalpy of activation isΒ Β . The correct potential energy profile for the reaction is:
| 1. | 2. | ||
| 3. | 4. |
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04
PYQ 2023
easy
chemistry ID: neet-202
What is the correct relationship between changes in enthalpy and internal energy within the following options?
1.
2.
3.
4.
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05
PYQ 2025
medium
chemistry ID: neet-202
Which of the following diagrams gives an accurate representation of the above reaction?
[Rβreactants; Pβproducts]
| 1. |  |
2. |  |
| 3. |  |
4. |  |
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