Mock Test on Chemical Thermodynamics Chemistry 2023

Mock Quiz For JEE, NEET, MHT-CET & Other INTERNAL EXAMINATIONS keep in touch us. This Quiz is based on the Chapter Ionic Equilibria from Chemistry. For more quizzes like this visit to our website. Domocktest is providing you the Quizzes for the Aspirants of NEET, JEE, MHT-CET, UPSC, and Other Internal and civil services Examinations for your practicing..

This Quiz Contains 20 Questions from the Ionic Equilibria Quick Practicing Mock Test for the better remembering. Best of Luck. With Love!!

The Subtopics of the quiz are based on

Terms used in thermodymanics
Nature of heat and work
Expression for pressure-volume (PV) work
Concept of maximum work
Internal Energy First law fof thermodynamics
Enthalpy(H)
Thermochemistry

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Created on February 02, 2022 By

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Chemical Thermodynamics

Transformation of liquid water into vapour, solid ice into liquid water, or burning of carbon forming carbon dioxide, CO₂, are accompanied by a change in energy. In the dry cell the chemical energy is converted into electrical energy. On the other hand, in the electroplating of metals electrical energy is converted into chemical energy. Thus it may be realized that the energy can be transformed from one form into another.

1 / 20

The system, which can exchange matter as well as energy with its surrounding is called as ______.

isolated system

open system

closed system

inert system

2 / 20

Which of the following is/are state function(s)?

Pressure

Volume

Temperature

All of these

3 / 20

For an isobaric process, which of the following is TRUE?

∆P=0

∆U=Q

Q=0

P∆V=0

4 / 20

Which of the following is an example of closed system?

Open Cup containing hot coffee

A cup containing hot coffee covered with saucer

A cup containing hot coffee covered with a saucer is insulated from the surroundings

all of these

5 / 20

For free expansion of gas in vacuum work done is__.

Positive

Negative

Positive or negative

Zero

6 / 20

In an isothermal expansion of an ideal gas___.

∆P=0

∆V=0

∆U=0

∆W=0

7 / 20

Thermodynamics is concerned with_____.

Mechanism of chemical reaction

energy changes in system

rate of chemical change

mass changes in nuclear reactions

8 / 20

Which of the following is CORRECT?

Q is a path function.

Qp is a path function.

G is a path function.

S is a path function.

9 / 20

For diatomic molecules, the bond enthalpy is the same as enthalpy of_____.

fusion

solution

ionization

atomization

10 / 20

Which of the following statements IS INCORRECT?

When one mole of liquid water freezes at 0°C, heat is evolved.

The enthalpy of solution is the sum of crystal lattice enthalpy and enthalpy of hydration.

The crystal lattice enthalpy is always positive.

The enthalpy of a reaction is always negative.

11 / 20

Which of the following values of ∆1Hº represents that the product is least stable?

231.6 kcal/mole

121.4 kcal/mole

+64.8 kcal/mole

-94.0 kcal/mole

12 / 20

For the reaction, C₃H_8(G) + 5O_2(G)------->3CO_2(G) + 4H₂O_(L)at constant temperature and pressure, ∆H is equal to

∆U - 2RT

∆U - RT

∆U - 5RT

∆U - 3RT

13 / 20

Find the INCORRECT statement.

The standard enthalpy of combustion of a substance is the standard enthalpy change accompanying a reaction in which one mole of the substance in its standard state is completely oxidised.

Hess's law is a direct consequence of the fact that enthalpy is a state function.

∆rHº for the reverse reaction equals in magnitude and opposite in the sign to that of the forward reaction.

The standard state of a substance is the form in which the substance is most stable at a pressure of 1 bar and at temperature 273 K

14 / 20

For a particular reaction, the system absorbs 5 kJ of heat and does 2 kJ of work on its surroundings. What is the change in internal energy?

+7 kJ

-7 kJ

+3 kJ

-3 kJ

15 / 20

For reaction; Ag₂O_{(s)--------->}2Ag + (1/2)O_2(g),the value of AH = 30.56 kJ mol and AS = 0.06 kJ K mol!. Temperature at which free energy change for reaction will be zero, is______.

373 K

413 K

509 K

693 K

16 / 20

Identify the CORRECT statement regarding a spontaneous process.

Exothermicity is the only criterion for deciding spontaneity of a process.

For a spontaneous process, the total entropy change is positive.

Endothermic processes are never spontaneous.

Exothermic processes are always spontaneous.

17 / 20

If the bond energies of H - H, Br Br and H Br bonds are 433, 192 and 364 kJ mol respectively, then A,Hº for the reaction: H_2(g) + Br_2(g)is ______kJ.

-103

+103

+261

-261

18 / 20

If same amounts of each of the four gases were taken, on expanding from a volume V1 to V2, the maximum work will be done in the case of_____.

CH4

CO2

19 / 20

The internal energy change when a system goes from state P to Q is 50 kJ. If the system goes from P 10 Q by a reversible path and returns to State P by an irreversible path, what would be the net change in internal energy?

50 kJ

10 kJ

100 kJ

20 / 20

Which of the following does NOT result in increase in the entropy?

Crystallisation of sugar from solution.

Dissolution of common salt in water.

Conversion of ice to water.

Vaporization of camphor.

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The average score is 46%

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Mock Test on Chemical Thermodynamics Chemistry 2023

The Subtopics of the quiz are based on

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