# First law of thermodynamics – MCQ online test

## Online MCQ test on First law of thermodynamics

– In this topic we offer you, online MCQ test in the fundmental of First law of thermodynamics.

– It is a simple test to measure the strength of your knowledge in the basics of understanding the topics of First law of thermodynamics.

– The test consists of only (20) questions (multiple choice) you must answer all of them so that your final score appears automatically at the top of the topic.

– you will pass the Exam If get 70% or more.

– If you fail the test, you can retake the test again by reloading the page

– Let’s start the test, good luck.

## Starting the test of First law of thermodynamics

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``` Results - (adsbygoogle = window.adsbygoogle || []).push({}); Congratulation (adsbygoogle = window.adsbygoogle || []).push({}); Try again #1. A thermos flask is an example of ____ . isolated system isolated system closed system closed system open system open system heterogeneous system heterogeneous system #2. The enthalpy change of a reaction is independent of ____ . state of the reactants and products state of the reactants and products nature of the reactants and products nature of the reactants and products initial and final enthalpy change of the reaction initial and final enthalpy change of the reaction different intermediate reaction different intermediate reaction #3. A system in which no thermal energy passes into or out of the system is called ____. adiabatic system adiabatic system an open system an open system a reversible system a reversible system a closed system a closed system #4. The amount of heat required to raise the temperature of one mole of the substance by 1 K is called _____. heat capacity heat capacity molar heat capacity molar heat capacity molar heat molar heat molar capacity molar capacity #5. The mathematical relation for the first law of thermodynamics is _____. ΔE = q – w ΔE = q – w ΔE = 0 for a cyclic process ΔE = 0 for a cyclic process ΔE = q for an isochoric process ΔE = q for an isochoric process all of these all of these #6. The enthalpy change, ΔH of a process is given by the relation _____ . ΔH = ΔE + p Δv ΔH = ΔE + p Δv ΔH = ΔE + Δn R T ΔH = ΔE + Δn R T ΔH = ΔE + w ΔH = ΔE + w all of these all of these #7. An intensive property does not depend upon ____ . nature of the substance nature of the substance quantity of matter quantity of matter external temperature external temperature atmospheric pressure atmospheric pressure #8. The work done in the reversible expansion of a gas from the initial state A to final state B is ___. maximum maximum minimum minimum equal to zero equal to zero equal to infinity equal to infinity #9. A closed system is one which cannot transfer matter but transfer _______ to and from its surrounding heat heat work work radiations radiations all of these all of these #10. Which of the following properties is not a function of state? concentration concentration internal energy internal energy enthalpy enthalpy entropy entropy #11. An isobaric process takes place at constant _______. temperature temperature pressure pressure volume volume concentration concentration #12. The first law of thermodynamics is ______. the total energy of an isolated system remains constant though it may change from one form to another the total energy of an isolated system remains constant though it may change from one form to another total energy of a system and surroundings remains constant total energy of a system and surroundings remains constant whenever energy of one type disappears, equivalent amount of another type is produced whenever energy of one type disappears, equivalent amount of another type is produced all of the above all of the above #13. system that can transfer neither matter nor energy to and from its surroundings is called __ . a closed system a closed system an isolated system an isolated system an open system an open system a homogeneous system a homogeneous system #14. Which is not true about thermodynamics? it ignores the internal structure of atoms and molecules it ignores the internal structure of atoms and molecules it involves the matter in bulk it involves the matter in bulk it is concerned only with the initial and final states of the system it is concerned only with the initial and final states of the system it is not applicable to macroscopic systems it is not applicable to macroscopic systems #15. The change in internal energy for an isobaric process is given by ___ . ΔE = q + p Δv ΔE = q + p Δv ΔE = q – p Δv ΔE = q – p Δv ΔE = q ΔE = q ΔE = p Δv ΔE = p Δv #16. The study of the flow of heat or any other form of energy into or out of a system undergoing physical or chemical change is called ____ . thermochemistry thermochemistry thermokinetics thermokinetics thermodynamics thermodynamics thermochemical studies thermochemical studies #17. A gas contained in a cylinder filled with a piston constitutes isolated system isolated system closed system closed system open system open system heterogeneous system heterogeneous system #18. A system that can transfer both energy and matter to and from its surroundings is called _____ . an isolated system an isolated system a closed system a closed system an open system an open system a heterogeneous system a heterogeneous system #19. Which of the following conditions holds good for an adiabatic process? dq < 0 dq < 0 dq > 0 dq > 0 dq = 0 dq = 0 dq = α dq = α #20. When the total energy change in an isothermal cycle is zero, it represents ____ . a reversible cycle a reversible cycle an adiabatic change an adiabatic change a thermodynamic equilibrium a thermodynamic equilibrium an irreversible cycle an irreversible cycle Finish ```
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