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.

Subtopic:  Types of Processes |
90%
From NCERT
NEET - 2009
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A polyatomic gas $$\left(\gamma = \frac{4}{3}\right)$$ is compressed to $$\frac{1}{8}$$ of its volume adiabatically. If its initial pressure is $$P_0,$$ its new pressure will be:

 1 $$8P_0$$ 2 $$16P_0$$ 3 $$6P_0$$ 4 $$2P_0$$
Subtopic:  Types of Processes |
85%
From NCERT
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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 $$P \rightarrow \mathrm{c}, Q \rightarrow \mathrm{d}, R \rightarrow \mathrm{b}, S \rightarrow a$$
Subtopic:  Types of Processes |
87%
From NCERT
NEET - 2017
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If an ideal gas undergoes two processes at constant volumes ${\mathrm{V}}_{1}$ $\mathrm{and}$ ${\mathrm{V}}_{2}$ as shown in the pressure-temperature (P-T) diagram, then:

1. ${\mathrm{V}}_{1}$ = ${\mathrm{V}}_{2}$

2. ${\mathrm{V}}_{1}$ > ${\mathrm{V}}_{2}$

3. ${\mathrm{V}}_{1}$ < ${\mathrm{V}}_{2}$

4. ${\mathrm{V}}_{1}\ge {\mathrm{V}}_{2}$

Subtopic:  Types of Processes |
80%
From NCERT
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Which of the following graph shows the variation of pressure P with volume V for an ideal gas at a constant temperature?

 1 2 3 4
Subtopic:  Types of Processes |
84%
From NCERT
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Which one of the following processes is reversible?

 1 Transfer of heat by radiation 2 Transfer of heat by conduction 3 Isothermal compression 4 Electrical heating of a nichrome wire
Subtopic:  Types of Processes |
76%
From NCERT
AIPMT - 2005
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An ideal gas at $$27^{\circ}\mathrm{C}$$ is compressed adiabatically to $\frac{8}{27}$ of its original volume. If $\gamma =\frac{5}{3}$, then the rise in temperature will be:
1. 450 K
2. 375 K
3. 225 K
4. 405 K

Subtopic:  Types of Processes |
76%
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Can two isothermal curves cut each other?

 1 Never 2 Yes 3 They will cut when the temperature is 0°C. 4 Yes, when the pressure is equal to the critical pressure.
Subtopic:  Types of Processes |
76%
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A monoatomic gas at a pressure $$P$$, having a volume $$V$$, expands isothermally to a volume $$2V$$ and then adiabatically to a volume $$16V$$. The final pressure of the gas is: $$\left(\text{Take:}~ \gamma = \frac{5}{3} \right)$$

1. $$64 ~P$$
2. $$32~P$$
3. $$\frac{P}{64}$$
4. $$16~P$$
Subtopic:  Types of Processes |
74%
From NCERT
AIPMT - 2014
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The initial pressure and volume of a gas are $$P$$ and $$V$$, respectively. First, it is expanded isothermally to volume $$4V$$ and then compressed adiabatically to volume $$V$$. The final pressure of the gas will be: [Given: $$\gamma = 1.5$$]

 1 $$P$$ 2 $$2P$$ 3 $$4P$$ 4 $$8P$$
Subtopic:  Types of Processes |
74%
From NCERT
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