NEET UG Thermodynamics & Equilibrium: Chemical Thermodynamics – Chapter Test
NEET UG Thermodynamics & Equilibrium: Chemical Thermodynamics – Chapter Test is an online chapter test in the NEET UG pattern, covering Thermodynamics & Equilibrium. 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 |
|---|---|
| Thermodynamics & Equilibrium | 20 |
Difficulty: 10 medium · 10 hard
Chemical Thermodynamics MCQ questions with answers
The first 3 of 20 questions. Unlock the series for the rest, each with a solution.
Q1. In thermodynamics, the standard state of a substance is specified with reference to a pressure of:
ऊष्मागतिकी में, किसी पदार्थ की मानक अवस्था निम्नलिखित में से किस दाब के संदर्भ में निर्दिष्ट की जाती है:
- A. 1 bar
- B. 1 atm
- C. 760 mm Hg at 273 K / 273 K पर 760 mm Hg
- D. 0.1 bar
Solution
The modern IUPAC/NCERT convention takes the standard state as a pressure of exactly 1 bar (= 10⁵ Pa) at a specified temperature; 1 atm (101.325 kPa) is the older convention.
आधुनिक IUPAC/NCERT परिपाटी में मानक अवस्था को निर्दिष्ट तापमान पर ठीक 1 bar (= 10⁵ Pa) दाब के रूप में लिया जाता है; 1 atm (101.325 kPa) पुरानी परिपाटी है।
Q2. The standard enthalpy of combustion of a substance is defined as the enthalpy change when:
किसी पदार्थ की मानक दहन एन्थैल्पी को उस एन्थैल्पी परिवर्तन के रूप में परिभाषित किया जाता है जब:
- A. one mole of the substance is completely burnt in oxygen, all substances being in their standard states / पदार्थ का एक मोल ऑक्सीजन में पूर्णतः जलाया जाता है, जबकि सभी पदार्थ अपनी मानक अवस्थाओं में हों
- B. one mole of the substance is formed from its elements in their standard states / पदार्थ का एक मोल इसके तत्वों से उनकी मानक अवस्थाओं में बनाया जाता है
- C. one mole of water is produced on neutralisation of an acid by a base / किसी अम्ल के क्षार द्वारा उदासीनीकरण पर जल का एक मोल उत्पन्न होता है
- D. one gram of the substance is burnt in excess oxygen / पदार्थ का एक ग्राम आधिक्य ऑक्सीजन में जलाया जाता है
Solution
By definition, standard enthalpy of combustion is the heat change on complete combustion of one mole of the substance with oxygen, all species in their standard states.
परिभाषा के अनुसार, मानक दहन एन्थैल्पी वह ऊष्मा परिवर्तन है जो पदार्थ के एक मोल के ऑक्सीजन में सम्पूर्ण दहन पर होता है, जबकि सभी स्पीशीज़ अपनी मानक अवस्थाओं में हों।
Q3. Arrange the following forms of water in order of increasing standard molar entropy: H2O(s), H2O(l), H2O(g). The correct order is:
जल के निम्नलिखित रूपों को बढ़ती हुई मानक मोलर एन्ट्रॉपी के क्रम में व्यवस्थित कीजिए: H2O(s), H2O(l), H2O(g)। सही क्रम है:
- A. H2O(s) < H2O(g) < H2O(l)
- B. H2O(g) < H2O(l) < H2O(s)
- C. H2O(s) < H2O(l) < H2O(g)
- D. H2O(l) < H2O(s) < H2O(g)
Solution
Molar entropy increases with molecular freedom, so the ordering is solid < liquid < gas.
मोलर एन्ट्रॉपी आणविक स्वतंत्रता के साथ बढ़ती है, अतः क्रम ठोस < द्रव < गैस होता है।
Frequently asked questions
How many questions are in the NEET UG Thermodynamics & Equilibrium: Chemical Thermodynamics – Chapter Test?
20 questions for 20 marks, to be answered in 20 minutes.
Is there negative marking in the NEET UG Thermodynamics & Equilibrium: Chemical Thermodynamics – Chapter Test?
Yes — 0.25 marks are deducted for each wrong answer, as in the real exam pattern.
Which topics does the NEET UG Thermodynamics & Equilibrium: Chemical Thermodynamics – Chapter Test cover?
Thermodynamics & Equilibrium (20 questions).
Is the NEET UG Thermodynamics & Equilibrium: Chemical Thermodynamics – Chapter Test free?
It is part of the NEET UG 2027 Mock Test Series (134 tests, ₹299). You can first try Biology in Human Welfare – Topic Test for free.
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