Q. No.Thermodynamic processes are indicated in the following diagram.
Match the following:
Column I
Column II
P.
Process-I
a.
Adiabatic
Q.
Process-II
b.
Isobaric
R.
Process-III
c.
Isochoric
S.
Process-IV
d.
Isothermal
1.
\(P \rightarrow \mathrm{a}, Q \rightarrow \mathrm{c}, R \rightarrow \mathrm{d}, S \rightarrow \mathrm{b}\)
2.
\(P \rightarrow \mathrm{c}, Q \rightarrow \mathrm{a}, R \rightarrow \mathrm{d}, S \rightarrow b\)
3.
\(P \rightarrow \mathrm{c}, Q \rightarrow \mathrm{d}, R \rightarrow \mathrm{b}, S \rightarrow a\)
4.
\(P \rightarrow \mathrm{c}, Q \rightarrow \mathrm{d}, R \rightarrow \mathrm{b}, S \rightarrow a\)
Match the following:
A gas is compressed isothermally to half its initial volume. The same gas is compressed separately through an adiabatic process until its volume is again reduced to half. Then:
| 1. | compressing the gas through an adiabatic process will require more work to be done. |
| 2. | compressing the gas isothermally or adiabatically will require the same amount of work to be done. |
| 3. | which of the case (whether compression through isothermal or through the adiabatic process) requires more work to be done will depend upon the atomicity of the gas. |
| 4. | compressing the gas isothermally will require more work to be done. |
An ideal gas is compressed to half its initial volume by means of several processes.
Which of the following processes results in the maximum work being done on the gas?
1. Adiabatic
2. Isobaric
3. Isochoric
4. Isothermal
During an adiabatic process, the pressure of a gas is found to be proportional to the cube of its temperature. The ratio of CP/CV for the gas is equal to:
| 1. | 4/3 | 2. | 2 |
| 3. | 5/3 | 4. | 3/2 |
An ideal gas goes from state A to state B via three different processes, as indicated in the P-V diagram. If indicates the heat absorbed by the gas along the three processes and indicates the change in internal energy along the three processes respectively, then:
| 1. | \(\mathrm{Q}_1>\mathrm{Q}_2>\mathrm{Q}_3 \) and \(\Delta \mathrm{U}_1=\Delta \mathrm{U}_2=\Delta \mathrm{U}_3\) |
| 2. | \(\mathrm{Q}_3>\mathrm{Q}_2>\mathrm{Q}_1\) and \(\Delta \mathrm{U}_1=\Delta \mathrm{U}_2=\Delta \mathrm{U}_3\) |
| 3. | \(\mathrm{Q}_1=\mathrm{Q}_2=\mathrm{Q}_3\) and \(\Delta \mathrm{U}_1>\Delta \mathrm{U}_2>\Delta \mathrm{U}_3\) |
| 4. | \(\mathrm{Q}_3>\mathrm{Q}_2>\mathrm{Q}_1\) and \(\Delta \mathrm{U}_1>\Delta \mathrm{U}_2>\Delta \mathrm{U}_3\) |
In thermodynamic processes, which of the following statements is not true?
| 1. | In an adiabatic process, the system is insulated from the surroundings. |
| 2. | In an isochoric process, the pressure remains constant. |
| 3. | In an isothermal process, the temperature remains constant. |
| 4. | In an adiabatic process, \(P V^\gamma\) = constant. |
In isothermal expansion, the pressure is determined by:
| 1. | Temperature only |
| 2. | Compressibility only |
| 3. | Both temperature and compressibility |
| 4. | None of these |
Under isothermal conditions, the volumes of ideal gas A and actual gas B grow from V to 2 V. The increase in internal energy:
| 1. | will be the same in both A and B. |
| 2. | will be zero in both the gases. |
| 3. | of B will be more than that of A. |
| 4. | of A will be more than that of B. |
The specific heat of a gas in an isothermal process is:
1. Infinite
2. Zero
3. Negative
4. Remains constant
The pressure and density of a diatomic gas changes adiabatically from (P, d) to (P', d'). If , then should be:
| 1. | 1/128 | 2. | 32 |
| 3. | 128 | 4. | None of the above |
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