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First Law of Thermodynamics MCQs

Prepare for First Law of Thermodynamics MCQs with verified questions, past-paper solutions, and conceptual explanations for CSS, PMS, FPSC, PPSC, and NTS examinations.

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Topic Notes: First Law of Thermodynamics

These notes summarize the key preparation context before you attempt the MCQs. Review the topic focus, then practice the questions below with answers and explanations.

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Master First Law of Thermodynamics MCQs for Competitive Exams with our comprehensive, verified question bank. Designed for students and competitive exam aspirants across Pakistan, this study resource provides topic-wise practice questions for CSS, PMS, FPSC, PPSC, SPSC, KPPSC, BPSC, NTS, and university entry tests.

Exam Focus
Aligned with FPSC, PPSC, and CSS syllabus criteria for First Law of Thermodynamics.
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Preparation Guide & Key Focus Areas for First Law of Thermodynamics MCQs

When preparing for First Law of Thermodynamics MCQs (Physics), focus on core definitions, historical timelines, relevant provisions, and commonly tested factual points. Review each question below, test your knowledge against the given options, and inspect the detailed explanation to solidify your understanding.

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11
25. The first law of thermodynamics is essentially a statement
12
To which law of thermodynamics, the concept of temperature is related to?
13
Sublimation refers to:
14
A system does 600 J of work and at the same time has its Internal energy increased by 320 J. How much heat has been supplied?
15
Which thermodynamic law states that the entropy of a perfect system approaches zero as temperature approaches absolute zero?
16
If a heat engine is doing a positive work in each cycle while losing some energy as heat, with no heat energy input, it is a clear violation of:
17
If a heat engine is doing a positive work in each cycle while losing some energy as heat, with no heat energy input, it is a clear violation of
18
Heat cannot be transferred from a colder to a hotter region unless work is done. This is the statement of
19
Which law states that if two systems are in thermal equilibrium with a third system, they are also in the thermal equilibrium with each other?
20
The rapid escape of air from a burst tyre is an example of: