# The intensive property among the following is: 1. Volume  2. Enthalpy  3. Molar heat capacity  4. Internal energy

Subtopic:  Classification of System, Extensive & Intensive Properties |
73%
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A reaction, $$A + B \rightarrow C+D - q~ cal.$$ is found to have a positive entropy change.
The reaction will be:
 1 possible at high temperature. 2 possible only at low temperatures. 3 not possible at any temperature. 4 possible at any temperature.
Subtopic:  Spontaneity & Entropy |
55%
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The work done when 1 mole of gas expands reversibly and isothermally from a pressure of 5 atm to 1 atm at 300 K is: ​
(Given log 5 = 0.6989 and R = 8.314 J K-1 mol-1)
1. zero J
2. 150 J
3. +4014.6 J
4. -4014.6 J

Subtopic:  First Law of Thermodynamics |
69%
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NEET - 2022
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NEET 2025 - Target Batch
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NEET 2025 - Target Batch

 Assertion (A): All combustion reactions are exothermic. Reason (R): For an exothermic reaction, enthalpies of products are greater than enthalpies of reactants $${(\Sigma v_p\Delta_fH(P)> \Sigma v_R\Delta_fH(R))}$$.

 1 Both (A) and (R) are true and (R) is the correct explanation of (A). 2 Both (A) and (R) are true but (R) is not the correct explanation of (A). 3 (A) is true but (R) is false. 4 (A) is false but (R) is true.

Subtopic:  Thermochemistry |
60%
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 Assertion (A): The increase in internal energy $$(\Delta E )$$ for the vapourisation of one mole of water at 1 atm and 373 K is zero. Reason (R): For all isothermal processes, $$\Delta E = 0$$.

 1 Both (A) and (R) are True and (R) is the correct explanation of (A). 2 Both (A) and (R) are True but (R) is not the correct explanation of (A). 3 (A) is True and (R) is False. 4 (A) and (R) both are False.
Subtopic:  Enthalpy & Internal energy |
75%
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NEET 2025 - Target Batch
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Match List I with List II
 List I List II A. $$\Delta H = q$$ I. $$P_{ext} =0$$ B. Free expansion II. Heat C. Path function III. At constant pressure D. Reversible process IV. An infinitely slow process that proceeds through a series of equilibrium states

Choose the correct answer from the options given below:
1.  A-I, B-III, C-II, D-IV
2.  A-I, B-II, C-III, D-IV
3.  A-III, B-I, C-IV, D-II
4.  A-III, B-I, C-II, D-IV
Subtopic:  Classification of System, Extensive & Intensive Properties | Cp & Cv |
81%
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The amount of heat required to raise the temperature of a body through 1 $$^\circ C$$ is called its:
 1 Molar Heat 2 Specific Heat 3 Entropy 4 Heat capacity
Subtopic:  Cp & Cv |
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$$\Delta_fH^\circ$$ is non-zero for which of the following species?
1. $$S_\text{monoclinic}$$
2.  $$C_\text{graphite}$$
3. H2(g)
4.  $$O_2(g)$$
Subtopic:  Thermochemistry |
77%
From NCERT
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For the given reaction:
$$2A(g) + B(g) + C(s) \rightarrow 2D(g)$$
$$\Delta \mathrm{U}^{\circ}=-10.5 \mathrm{~kJ} \text { and } \Delta \mathrm{S}^{\circ}=-44.1 \mathrm{JK}^{-1}$$
The value of $$\Delta G^o$$ for the above reaction at 25 °C will be :
 1 1.2 kJ 2 0.16 kJ 3 3.2 kJ 4 1.6 kJ
Subtopic:  Gibbs Energy Change |
56%
From NCERT
For which of the following equations, $$\Delta H > \Delta E$$ ?
$$1.~~\mathrm{N}_{2}(g)+3 \mathrm{H}_{2}(\mathrm{~g}) \longrightarrow 2 \mathrm{NH}_{3}(\mathrm{g})\\ \\ 2.~~\mathrm{H}_{2}(g)+\frac{1}{2} \mathrm{O}_{2}(\mathrm{~g}) \longrightarrow \mathrm{H}_{2} \mathrm{O}(\mathrm{l})\\ \\ 3.~~\mathrm{PCl}_{5}(g) \rightarrow \mathrm{PCl}_{3}(g)+\mathrm{Cl}_{2}(g)\\ 4.~~\mathrm{H}_{2}(\mathrm{~g})+\mathrm{I}_{2}(\mathrm{~g}) \rightarrow 2 \mathrm{HI}(\mathrm{g})$$