The first law of thermodynamics is a statement of:

 1 conservation of heat 2 conservation of work 3 conservation of momentum 4 conservation of energy

Subtopic:  First Law of Thermodynamics |
86%
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

Figure shows two processes $$A$$ and $$B$$ on a system. Let $$\Delta Q_1$$ and $$\Delta Q_2$$ be the heat given to the system in processes $$A$$ and $$B$$ respectively. Then:

1. $$\Delta Q_1>\Delta Q_2$$
2. $$\Delta Q_1=\Delta Q_2$$
3. $$\Delta Q_1<\Delta Q_2$$
4. $$\Delta Q_1\leq \Delta Q_2$$

Subtopic:  First Law of Thermodynamics |
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

A system can be taken from the initial state p1, V1 to the final state p2 , V2 by two different methods. Let ΔQ and ΔW represent the heat given to the system and the work done by the system. Which of the following must be the same in both the methods ?

1.  ΔQ

2.  ΔW

3.  ΔQ + ΔW

4.  ΔQ – ΔW

Choose the correct option

1.  (a) , (b)

2. (b) , (c)

3.  (d) only

4. (a) , (d)

Subtopic:  First Law of Thermodynamics |
79%
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

Work done by a sample of an ideal gas in a process A is double the work done in another process B. The temperature rises through the same amount in the two processes. If CA and CB be the molar heat capacities for the two processes,

1.  CA = CB

2.  CA < C

3.  CA > CB

4.  CA and CB cannot be defined

Subtopic:  First Law of Thermodynamics |
57%
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

Let Q and W denote the amount of heat given to an ideal gas and the work done by it in an adiabatic process,

(a) Q = 0

(b) W = 0

(c) Q = W

(d) Q ≠ W

Choose the correct option

1. (a) , (b)

2. (b) , (c)

3. (c) , (d)

4. (a) , (d)

Subtopic:  First Law of Thermodynamics |
85%
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