# A closed hollow insulated cylinder is filled with gas at $$0^{\circ}\mathrm{C}$$ and also contains an insulated piston of negligible weight and negligible thickness at the middle point. The gas on one side of the piston is heated to $$100​​^{\circ}\mathrm{C}$$. <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> If the piston moves 5 cm, the length of the hollow cylinder will be: 1. 13.65 cm 2. 27.3 cm 3. 38.6 cm 4. 64.6 cm

Subtopic:  Types of Processes |
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

A monoatomic gas is supplied with the heat $$Q$$ very slowly, keeping the pressure constant. The work done by the gas will be:
1. $${2 \over 3}Q$$
2. $${3 \over 5}Q$$
3. $${2 \over 5}Q$$
4. $${1 \over 5}Q$$

Subtopic:  Molar Specific Heat |
61%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

The molar heat capacity in case of a diatomic gas if it does a work of $\frac{Q}{4}$ when heat Q is supplied to it is:

1. $\frac{2}{5}R$

2. $\frac{5}{2}R$

3. $\frac{10}{3}R$

4. $\frac{6}{7}R$

Subtopic:  Molar Specific Heat |
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

A cyclic process for $$1$$ mole of an ideal gas is shown in the $$V\text-T$$ diagram. The work done in $$AB, BC$$ and $$CA$$ respectively is:

 1 $$0, R T_2 \ln \left(\frac{V_1}{V_2}\right), R\left(T_1-T_2\right)$$ 2 $$R\left(T_1-T_2\right), 0, R T_1 \ln \frac{V_1}{V_2}$$ 3 $$0, R T_2 \ln \left(\frac{V_2}{V_1}\right), R\left(T_1-T_2\right)$$ 4 $$0, R T_2 \ln \left(\frac{V_2}{V_1}\right), R\left(T_2-T_1\right)$$
Subtopic:  Cyclic Process |
56%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

The Carnot cycle (reversible) of gas is represented by a pressure-volume curve as shown. Consider the following statements:

 I. Area $$ABCD$$ = Work done on the gas II. Area $$ABCD$$ = Net heat absorbed III. Change in the internal energy in cycle = $$0$$

Which of the statement(s) given above is/are correct?

 1 I only 2 II only 3 II and III 4 I, II, and III
Subtopic:  Cyclic Process |
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

Which one of the following is correct for one complete cycle of a thermodynamic process on a gas as shown in the $$(P-V)$$ diagram?

 1 $$\Delta E_{int}= 0, Q<0$$ 2 $$\Delta E_{int}= 0, Q>0$$ 3 $$\Delta E_{int}>0, Q<0$$ 4 $$\Delta E_{int}< 0, Q>0$$
Subtopic:  Cyclic Process |
68%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

In the following figures, four curves A, B, C and D, are shown. The curves are:

 1 isothermal for A and D while adiabatic for B and C. 2 adiabatic for A and C while isothermal for B and D. 3 isothermal for A and B while adiabatic for C and D. 4 isothermal for A and C while adiabatic for B and D.
Subtopic:  Types of Processes |
74%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

When an ideal diatomic gas is heated at constant pressure, the fraction of the heat energy supplied which increases the internal energy of the gas is?

 1 $$2 \over 5$$ 2 $$3 \over 5$$ 3 $$3 \over 7$$ 4 $$5 \over 7$$
Subtopic:  Molar Specific Heat |
71%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

In a Carnot engine, when $$T_2=0^\circ \mathrm{C}$$ and $$T_1=200^\circ \mathrm{C},$$ its efficiency is $$\eta_1$$ and when $$T_1=0^\circ \mathrm{C}$$ and $$T_2=-200^\circ \mathrm{C},$$ its efficiency is $$\eta_2.$$ What is the value of $$\frac{\eta_1}{\eta_2}?$$

 1 0.577 2 0.733 3 0.638 4 cannot be calculated
Subtopic:  Carnot Engine |
73%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

In a cyclic process, the internal energy of the gas:

 1 Increases 2 Decreases 3 Remains constant 4 Becomes zero
Subtopic:  Cyclic Process |
54%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch