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Q. No.Identify correct match using Column I & Column II
| Column I | Column II | ||
| (i) | Spontaneous process | (a) | Isothermal and isobaric process |
| (ii) | \(\Delta H^\circ\) | (b) | \(\Delta H<0 \) |
| (iii) | \(\Delta T=0, \Delta P=0 \) | (c) | \(\Delta G<0 \) |
| (iv) | Exothermic process | (d) | (Bond energy of reactant) - (Bond energy of product) |
| I | II | III | IV | |
| 1. | c | d | a | b |
| 2. | b | a | c | d |
| 3. | d | b | c | d |
| 4. | a | d | b | c |
Subtopic: First Law of Thermodynamics | Spontaneity & Entropy | Gibbs Energy Change |
94%
From NCERT
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| (i) | When liquid crystallizes into a solid, entropy increases. |
| (ii) | When the temperature of a crystalline solid is raised from 0 K to 115 K then entropy increases. |
| (iii) | 2 NaHCO3 (s) →Na2CO3 (s) +CO2(g)+H2O(g); Entropy increases. |
| (iv) | H2(g)→2H(g) ; Entropy decreases. |
Subtopic: Spontaneity & Entropy |
82%
From NCERT
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For \(\Delta G <0 \) , a reaction is spontaneous only if :
| 1. | Pressure is constant. |
| 2. | Temperature is constant. |
| 3. | Both pressure and temperature are constant. |
| 4. | Both temperature and volume are constant. |
Subtopic: Spontaneity & Entropy |
56%
From NCERT
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The entropy change for the melting of 'x' moles of ice at 273 K and 1 atm pressure is 28.80 cal K–1.
The value of 'x' is:
(Given: heat of fusion is 80 cal g–1)
| 1. | 4.32 mol | 2. | 8.56 mol |
| 3. | 10.36 mol | 4. | 5.46 mol |
Subtopic: Spontaneity & Entropy |
66%
From NCERT
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According to the law, a perfect crystal's entropy is 0 at absolute zero, which is:
1. The first law
2. Second law
3. Third law
4. None of the above
Subtopic: Spontaneity & Entropy |
60%
From NCERT
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| Statement I: | ∆S total i.e., ∆Ssys + ∆Ssurr is zero for the irreversible process. |
| Statement II: | Total entropy change for the system and surrounding of a spontaneous process is zero. |
| 1. | Statement I is False but Statement II is True. |
| 2. | Both Statement I and Statement II are True. |
| 3. | Both Statement I and Statement II are False. |
| 4. | Statement I is True but Statement II is False. |
Subtopic: Spontaneity & Entropy |
54%
From NCERT
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