JEE Main Properties of Matter & Heat: Thermodynamics – Chapter Test
JEE Main Properties of Matter & Heat: Thermodynamics – Chapter Test is an online chapter test in the JEE Main pattern, covering Properties of Matter & Heat. Attempt it on SeatBeat with a timer like the real exam, then see a detailed solution for every question and your score and weak-topic analysis.
Topics in this test
| Topic | Questions |
|---|---|
| Properties of Matter & Heat | 20 |
Difficulty: 9 medium · 11 hard
Thermodynamics MCQ questions with answers
The first 3 of 20 questions. Unlock the series for the rest, each with a solution.
Q1. For a certain ideal gas the molar heat capacity at constant pressure is 29.1 J mol⁻¹ K⁻¹. Using R = 8.31 J mol⁻¹ K⁻¹, its molar heat capacity at constant volume is nearest to:
किसी आदर्श गैस के लिए स्थिर दाब पर मोलर ऊष्मा धारिता 29.1 J mol⁻¹ K⁻¹ है। R = 8.31 J mol⁻¹ K⁻¹ का उपयोग करते हुए, स्थिर आयतन पर इसकी मोलर ऊष्मा धारिता निकटतम रूप से है:
- A. 37.4 J mol⁻¹ K⁻¹
- B. 8.31 J mol⁻¹ K⁻¹
- C. 24.9 J mol⁻¹ K⁻¹
- D. 20.8 J mol⁻¹ K⁻¹
Solution
By Mayer's relation Cv = Cp − R = 29.1 − 8.31 ≈ 20.8 J mol⁻¹ K⁻¹.
मेयर के संबंध द्वारा Cv = Cp − R = 29.1 − 8.31 ≈ 20.8 J mol⁻¹ K⁻¹।
Q2. Which one of the following thermodynamic properties is NOT an intensive property?
निम्नलिखित ऊष्मागतिक गुणधर्मों में से कौन-सा एक गहन (intensive) गुणधर्म नहीं है?
- A. Pressure / दाब
- B. Density / घनत्व
- C. Internal energy / आंतरिक ऊर्जा
- D. Temperature / ताप
Solution
Internal energy is proportional to the amount of substance and is therefore extensive. Pressure, temperature and density do not depend on the size of the system and are intensive.
आंतरिक ऊर्जा पदार्थ की मात्रा के समानुपाती होती है और इसलिए विस्तृत (extensive) गुणधर्म है। दाब, ताप और घनत्व निकाय के आकार पर निर्भर नहीं करते और गहन गुणधर्म हैं।
Q3. The zeroth law of thermodynamics, which states that two systems each in thermal equilibrium with a third system are in thermal equilibrium with each other, provides the physical basis for defining which quantity?
ऊष्मागतिकी का शून्यवाँ नियम, जो कहता है कि दो निकाय जो प्रत्येक किसी तीसरे निकाय के साथ ऊष्मीय साम्य में हों, वे आपस में भी ऊष्मीय साम्य में होते हैं, किस राशि को परिभाषित करने का भौतिक आधार प्रदान करता है?
- A. Temperature / तापमान
- B. Enthalpy / एन्थैल्पी
- C. Entropy / एन्ट्रॉपी
- D. Internal energy / आंतरिक ऊर्जा
Solution
The transitivity of thermal equilibrium expressed by the zeroth law is what allows temperature to be defined as a measurable property; entropy, internal energy and enthalpy arise from the second and first laws.
शून्यवें नियम द्वारा व्यक्त ऊष्मीय साम्य की संक्रमणीयता (transitivity) ही वह है जो तापमान को एक मापने योग्य गुणधर्म के रूप में परिभाषित करने की अनुमति देती है; एन्ट्रॉपी, आंतरिक ऊर्जा और एन्थैल्पी द्वितीय और प्रथम नियमों से उत्पन्न होती हैं।
Frequently asked questions
How many questions are in the JEE Main Properties of Matter & Heat: Thermodynamics – Chapter Test?
20 questions for 20 marks, to be answered in 20 minutes.
Is there negative marking in the JEE Main Properties of Matter & Heat: Thermodynamics – Chapter Test?
Yes — 0.25 marks are deducted for each wrong answer, as in the real exam pattern.
Which topics does the JEE Main Properties of Matter & Heat: Thermodynamics – Chapter Test cover?
Properties of Matter & Heat (20 questions).
Is the JEE Main Properties of Matter & Heat: Thermodynamics – Chapter Test free?
It is part of the JEE Main 2027 Mock Test Series (104 tests, ₹299). You can first try Basic Concepts & Atomic Structure – Topic Test for free.
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