The entropy change in the fusion of one mole of a solid melting at 27C is -
(the latent heat of fusion is 2930 J mol-1)
1. 9.77 JK-1mol-1
2. 19.73 JK-1mol-1
3. 2930 JK-1mol-1
4. 108.5 JK-1mol-1
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe maximum work done in expanding 16 g oxygen at 300 K and occupying a volume of 5 dm3 isothermally until the volume becomes 25 dm3 is:
1. 2.01 x 103 J
2. +2.81 x 103 J
3. 2.01 x 10-3 J
4. +2.01 x 10-6 J
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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 & BiologyFor the process
H2O(l) H2O(g)
at T=100C and 1 atmosphere pressure, the correct choice is:
1.
2.
3.
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyDuring an adiabatic process:
1. pressure is maintained constant
2. gas is isothermally expanded
3. there is perfect heat insulation
4. the system changes heat with surroundings
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyHeat of combustion for C(s), H2(g) and CH4(g) are -94, -68 and -213 kcal/mol. Then, for
C(s) + 2H2(g) CH4(g) is
1. -17 kcal/mol
2. -111 kcal/mol
3. -170 kcal/mol
4. -85 kcal/mol
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIf 50 calorie are added to a system and system does work of 30 calorie on surroundings, the change in internal energy of system is:
1. 20 cal
2. 50 cal
3. 40 cal
4. 30 cal
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyFor the process:
H2O(l)[1 bar, 373 K] H2O(g)[1 bar, 373 K] the correct set of thermodynamic parameters are:
1.
2.
3.
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe internal energy change when a system goes from state A to B is 40 kJ/mol. If the system goes from A to B by a reversible path and returns to state A by an irreversible path. What would be the change in internal energy?
1. 40 kJ
2. >40 kJ
3. <40 kJ
4. Zero
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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 & Biology