Enthalpy of the reaction,
CH4(g) + 1/2O2(g) CH3OH(l), is negative. If the enthalpy of combustion of CH4 and CH3OH are x and y respectively, then
which relation is correct?
1. x>y
2. x<y
3. x=y
4. xy
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn the reaction, H and S both are positive. The condition under which the reaction would not be spontaneous is -
1. H>TS
2. S=H/T
3. H=TS
4. All of the above
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhen an ideal gas is compressed adiabatically and reversibly, the final temperature is:
1. higher than the initial temperature
2. lower than the initial temperature
3. the same as the initial temperature
4. dependent on the rate of compression
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology1 liter-atmosphere is equal to:
1. 101.3 J
2. 24.20 cal
3. 101.3 x 107 erg
4. All of the above
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe standard change is Gibbs energy for the reaction,
H2OH+ + OH- at 25C is:
1. 100 kJ
2. -90 kJ
3. 90 kJ
4. -100 kJ
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe 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 & Biology