- 1(current)
Q. No.The standard heat of formation, in kcal/mol of \(Ba^{2+}\) is :
[Given : standard heat of formation of \(SO^{2-}_4\) ion (aq) \(= -216~ \text{kcal/mol}\), standard heat of crystallisation of \(BaSO_4 (s)= -4.5~\text{ kcal/mol,}\) standard heat of formation of \(BaSO_4 (s)= -349 ~\text{kcal/mol]}\)
1. \(+133.0 \)
2. \(+220.5\)
3. \(-128.5 \)
4. \(-133.0\)
[Given : standard heat of formation of \(SO^{2-}_4\) ion (aq) \(= -216~ \text{kcal/mol}\), standard heat of crystallisation of \(BaSO_4 (s)= -4.5~\text{ kcal/mol,}\) standard heat of formation of \(BaSO_4 (s)= -349 ~\text{kcal/mol]}\)
1. \(+133.0 \)
2. \(+220.5\)
3. \(-128.5 \)
4. \(-133.0\)
Subtopic: Thermochemistry |
From NCERT
NEET - 2025
Please attempt this question first.
Hints
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The standard enthalpy of neutralization is \(-57.3 \mathrm{~K}{\mathrm{J}}~ \mathrm{mol}^{-1}\) as:
\(\small{\underset{\text{strong acid}}{\mathrm{HCl_{(aq)}}}+\underset{\text{strong base}}{\mathrm{NaOH_{(aq)}}}\rightarrow\mathrm{NaCl_{(aq)}+H_2O(l),\Delta H=-57.3~KJ mol^{-1}}} \)
The enthalpy of neutralization of \(0.25 \mathrm{~mol}\) of HCI by \(0.25 \mathrm{~mol}\) of \(\mathrm{NaOH}\) is :
1. \(-57.3~ \mathrm{kJ} ~\mathrm{mol}^{-1}\)
2. \(-28.3 \mathrm{~kJ} \mathrm{~mol}^{-1}\)
3. \(-14.32 \mathrm{~kJ} \mathrm{~mol}^{-1}\)
4. \(+57.3~ \mathrm{kJ}~ \mathrm{mol}^{-1}\)
\(\small{\underset{\text{strong acid}}{\mathrm{HCl_{(aq)}}}+\underset{\text{strong base}}{\mathrm{NaOH_{(aq)}}}\rightarrow\mathrm{NaCl_{(aq)}+H_2O(l),\Delta H=-57.3~KJ mol^{-1}}} \)
The enthalpy of neutralization of \(0.25 \mathrm{~mol}\) of HCI by \(0.25 \mathrm{~mol}\) of \(\mathrm{NaOH}\) is :
1. \(-57.3~ \mathrm{kJ} ~\mathrm{mol}^{-1}\)
2. \(-28.3 \mathrm{~kJ} \mathrm{~mol}^{-1}\)
3. \(-14.32 \mathrm{~kJ} \mathrm{~mol}^{-1}\)
4. \(+57.3~ \mathrm{kJ}~ \mathrm{mol}^{-1}\)
Subtopic: Thermochemistry |
61%
NEET - 2024
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NEET 2026 - Target Batch - Vital
Hints
Consider the following reaction:
\(\mathrm{2H_2(g) + O_2(g) \rightarrow 2H_2O(g) \Delta_rH^\circ = -483.64 kJ. }\)
What is the enthalpy change for the decomposition of one mole of water?
\(\mathrm{2H_2(g) + O_2(g) \rightarrow 2H_2O(g) \Delta_rH^\circ = -483.64 kJ. }\)
What is the enthalpy change for the decomposition of one mole of water?
| 1. | 120.9 kJ | 2. | 241.82 kJ |
| 3. | 18 kJ | 4. | 100 kJ |
Subtopic: Thermochemistry |
88%
From NCERT
NEET - 2023
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
Hints
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NEET 2026 - Target Batch - Vital
At standard conditions, if the change in the enthalpy for the following reaction is –109 kJ mol–1
H2(g)+Br2(g)2HBr(g) and the bond energy of H2 and Br2 is 435 kJ mol–1 and 192 kJ mol–1 respectively, what is the bond energy (in kJ mol–1) of HBr?
| 1. | 368 | 2. | 736 |
| 3. | 518 | 4. | 259 |
Subtopic: Thermochemistry |
56%
From NCERT
NEET - 2020
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
Hints
Links
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NEET 2026 - Target Batch - Vital
- 1(current)
Q. No.
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