- 1(current)
Q. No.The enthalpy and entropy change for the reaction :
Br2 (l) + Cl2 (g) 2BrCl (g)
are 30 kJ mol-1 and 105 J K-1 mol-1 respectively.
The temperature at which the reaction will be in equilibrium is :
| 1. | 285.7 K | 2. | 273.4 K |
| 3. | 450.9 K | 4. | 300.1 K |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology| Assertion (A): | A liquid crystallizes into a solid and is accompanied by a decrease in entropy. |
| Reason (R): | In crystals, molecules organize in an ordered manner. |
| 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. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyEntropy decreases during:
1. Crystallization of sucrose from solution
2. Rusting of iron
3. Melting of ice
4. Vaporization of camphor
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyMatch the following process with entropy change:
| Reaction | Entropy change | ||
| A. | A liquid vaporizes | 1. | |
| B. | Reaction is non-spontaneous at all temperatures and is positive | 2. | |
| C. | Reversible expansion of an ideal gas | 3. |
Codes:
| A | B | C | |
| 1. | 2 | 3 | 1 |
| 2. | 1 | 2 | 3 |
| 3. | 1 | 3 | 2 |
| 4. | 3 | 2 | 1 |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyFor the reaction, , the value of ∆H and ∆S are respectively:
1.
2.
3.
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyMatch the following parameters with a description for spontaneity.
| \(\Delta\) (Parameters) \(\Delta r\ H^⊝\) \(\Delta r\ S^⊝\)\(\Delta r\ G^⊝\) | Description | ||
| A. | + – + | 1. | Non-spontaneous at high temperature |
| B. | – – + at high T | 2. | Spontaneous at all temperatures |
| C. | – + – | 3. | Non-spontaneous at all temperatures |
Codes:
| A | B | C | |
| 1. | 3 | 1 | 2 |
| 2. | 1 | 2 | 3 |
| 3. | 1 | 3 | 2 |
| 4. | 3 | 2 | 1 |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe entropy change in the isothermal reversible expansion of 2 moles of an ideal gas from 10 to 100 L at 300 K is
1.
2.
3.
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyChange in entropy is negative for:
1. Bromine (l)Bromine(g)
2. C(s) + H2O(g) CO(g) + H2(g)
3. N2(g,10 atm)N2(g,1 atm)
4. Fe ( 1mol, 400 K) Fe( 1mol, 300 K)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology1 mole of an ideal gas at 25 is subjected to expand reversibly ten times of its initial volume. The change in entropy of expansion is:
1. 19.15 JK-1mol-1
2. 16.15 JK-1mol-1
3. 22.15 JK-1mol-1
4. None of the above
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology| Assertion (A): | Dissolution of sugar in water proceeds via an increase in entropy. |
| Reason (R): | Entropy decreases, when an egg is boiled hard. |
| 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. | Both (A) and (R) are false. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology- 1(current)
Q. No.
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