CHM201

Category: CHM201

ATTENTION:

Kindly note that you will be presented with 50 questions randomized from the NOUN question bank. Make sure to take the quiz multiple times so you can get familiar with the questions and answers, as new questions are randomized in each attempt.

Good luck!

CHM201

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1. The ___________ law of thermodynamics discusses entropy.

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2. For any process, the change in entropy of the universe equals the sum of entropy changes to the system and the _________

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3. __________ Variables are dependent on the mass of the material.

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4. In order for a reaction to occur, the particles must __________

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5. Milk sours more rapidly in summer than in winter because ____________

A. in summer, the temperature Is high due to which effective collisions increase and hence the rate of reaction becomes fast

B. in summer, the energy of activation decreases and hence the of reaction becomes fast

C. in winter, number of molecules per unit volume increases and hence the rate of reaction becomes fast

D. none of the above

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6. Which of the following is not a state function?

A. enthalpy

B. free energy

C. entropy

D. work

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7. The entropy of a pure crystal at 0 K is _________ J/K.

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8. A process in which no heat is allowed to enter or leave a system is termed _______

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9. In a reaction in which the rate of the reverse reaction is equal to the rate of the forward reaction, a state of __________ is attained.

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10. A process taking place at constant pressure is termed _________

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11. Which of the following statements is correct?

A. both temperature and heat are extensive properties.

B. temperature is an intensive property while heat is an extensive property

C. Temperature is an extensive property while heat is an intensive property

D. both temperature and heat are intensive properties

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12. A substance that is capable of acting as both an acid and as a base is ______________

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13. The ___________ scale of temperature has absolute zero for its zero point

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14. The minimum additional energy, above the average internal energy, which the reacting molecules must possess so that their collision result in a reaction is known as _____________

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15. The factor that affects the rate of reaction is ___________

A. Catalyst

B. All of these

C. Nature and concentration of the reactants

D. Temperature of the reactants

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16. Which of the following expressions is associated with the law of conservation of energy?

A. q = mCdT

B. dE = q + w

C. dG = dH – TdS

D. H = E + PV

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17. Which of these is true of an isochoric system?

A. Volume remains constant

B. Heat is allowed into the system but not allowed out of the system

C. Pressure is not constant

D. Takes place at constant temperature

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18. The change in entropy for any process is not dependent upon the pathway by which the process occurs. In order words, the change in entropy for any process is a _________ function

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19. The term -dx/dt in a rate expression refers to the ________

A. instantaneous rate of the reaction

B. Average rate of the reaction

C. Change in concentration of the reactants with time

D. increase in concentration of the reactants

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20.

Every type of chemical bond contains a certain amount of energy. The total bond energy, which is essentially equivalent to the total potential energy of the system, is a quantity known
as: ____________

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21. The _________ scale of temperature has absolute zero for its zero point

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22. The minimum additional energy, above the average internal energy, which the reacting molecules must possess so that their collision result in a reaction is known as ____________

A. Threshold energy

B. Kinetic energy

C. Thermodynamic energy

D. Activation energy

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23. If more collisions can be made to take place in a given time, the rate of the reaction will ___________

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24. ______________ is the amount of heat required to melt one gram of substance at its melting point.

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25. Rate of reaction is defined as the __________

A. Rate of change of conc. of product only

B. None of the above

C. Rate of change of conc. of reactant only

D. Rate of change of concentration Of either reactant or product per unit time

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26. The first law of thermodynamics deals with ____________

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27. __________ system is a system in which both energy and matter can exchange with the surroundings.

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28. The total energy of the universe is constant. This is a statement of the ___________ law of thermodynamics

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29. The higher the pH, the ___________ the acidity

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30. A reaction catalyzed by light is called a ___________ reaction

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31. The temperature at which the motion of particles theoretically ceases is known as ___________ zero.

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32. The first law of thermodynamics deals with _________

A. entropy

B. absolute zero temperature.

C. conservation of energy

D. thermodynamic equivalence

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33. If the rate of a reaction increases by a factor of 9 when the concentration of a reactant is tripled, then the reaction is ___________order with respect to that reactant.

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34. The ___________ law of thermodynamics discusses entropy.

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35. Rate of reaction generally ____________ with the rise of temperature.

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36. Free energy change at equilibrium is ___________

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37. The reactions with the high value of energy of activation are _________

A. Slow

B. Moderate

C. Fast

D. Not feasible

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38. Which of the following statements describes an isolated system?

A. only exchange of energy with the surrounding is possible

B. only exchange of matter with the surrounding is possible

C. exchange of both matter and energy with the surrounding is possible

D. No exchange of matter and energy with the surrounding is possible

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39. One mole of an ideal gas is heated at a constant pressure of 101300 $N m^{-2}$, from 273.2 K to 373 K. Calculate the work involved R = 8.314 J/mol/K).

A. 8.314 J/mol

B. 831.4 J/mol

C. 83.14 J/mol

D. 8314 J/mol

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40. The pH of an aqueous solution which is 0.0020 M is _________

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41. Which of the followings is not a type of system?

A. Open

B. Closed

C. Intensive

D. Isolated

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42. The conjugate base of HCl is __________

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43. A solution of a weak acid and its salt is known as a ________ solution

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44. Rusting of iron Is an example of________ reaction

A. explosive

B. Slow

C. Fast

D. Moderate

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45. There are ___________ laws of thermodynamics

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46. A (an) ___________ system is one which neither shows exchange of heat nor mass with its surroundings

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47. _____________ Variables are independent of the mass of material.

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48. The sum of all exponents of concentration terms in the rate equation is called __________

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49. In general, the rate of a reaction can be increased by all the factors except ___________

A. Using a catalyst

B. Increasing the activation energy

C. Increasing the concentration of reactants

D. Increasing the temperature

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50. Which of these is not an extensive property of a system?

A. Volume

B. Energy

C. Mass

D. Density

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