# The loss of available energy associated with the transfer of 1000 kJ of heat from a constant temperature system at 600 K to another at 400 K when the environmental temperature is 300 K is

1.  166.67 kJ

2.  250 kJ

3.  500 kJ

4.  750 kJ

4

166.67 kJ

Explanation :
No Explanation available for this question

# Which one of the following pairs best expresses a relationship similar to that expressed in the pair `pressure-volume` for a thermodynamic system undergoing a process

1.  Enthalpy-entropy

2.  Pressure-entropy

3.  Pressure-temperature

4.  Temperature-entropy

4

Temperature-entropy

Explanation :
No Explanation available for this question

# In a reversible cycle, the source temperature is 2270 C and the sink temperature is 270 C. The maximum available work for a heat input of 100 kJ will be

1.  100 kJ

2.  60 kJ

3.  40 kJ

4.  88 kJ

4

40 kJ

Explanation :
No Explanation available for this question

# The efficiency η of any heat engine and efficiency ηR of a reversible heat engine operating between common heat source and heat sink are related as

1.  η > ηR

2.  η < ηR

3.  η ≥ ηR

4.  η ≤ ηR

4

η < ηR

Explanation :
No Explanation available for this question

# The efficiency of a reversible cyclic process undergone by a substance as shown in the given diagram is

1.  0.40

2.  0.55

3.  0.66

4.  0.80

4

0.66

Explanation :
No Explanation available for this question

# The temperature of a gas is a measure of

1.  Average distance between gas molecules

2.  Average kinetic energy of gas molecules

3.  Average potential energy of gas molecules

4.  None of these

4

Average kinetic energy of gas molecules

Explanation :
No Explanation available for this question

# According to kinetic theory of gases

1.  Temperatures should rise during boiling

2.  Temperature should fall during freezing

3.  At absolute zero, there is absolutely no vibration of molecules

4.  All of these

4

At absolute zero, there is absolutely no vibration of molecules

Explanation :
No Explanation available for this question

# All perfect gases change in volume by 1/273 th of its original volume at 00 C for every 10C change in temperature, when pressure remains constant. This statement is

1.  Boyle’s law

2.  Charle,s law

3.  Joule’s law

4.  Gay Lussac law

4

Charle,s law

Explanation :
No Explanation available for this question

# A gas which obeys kinetic theory perfectly is

1.  Pure gas

2.  Real gas

3.  Perfect gas

4.  All of these

4

Real gas

Explanation :
No Explanation available for this question

# According to Gay-Lussac’s law for perfect gases, the absolute pressure of given mass varies directly as

1.  Temperature

2.  Absolute temperature

3.  Absolute temperature, if volume remains constant

4.  Product of absolute temperature and volume

4