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

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2. The ___________ law of thermodynamics discusses entropy.

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3. 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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4. The first law of thermodynamics deals with _________

A. absolute zero temperature.

B. entropy

C. thermodynamic equivalence

D. conservation of energy

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5. There are ___________ laws of thermodynamics

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6. 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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7. 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. Activation energy

B. Kinetic energy

C. Thermodynamic energy

D. Threshold energy

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8. Which of the following statements is correct?

A. both temperature and heat are extensive properties.

B. both temperature and heat are intensive properties

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

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

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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. 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. 83.14 J/mol

C. 831.4 J/mol

D. 8314 J/mol

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

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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. A reaction catalyzed by light is called a ___________ reaction

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

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

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

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17. Only __________ substances can undergo electrolysis.

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

A. none of the above

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

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

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

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

A. Takes place at constant temperature

B. Volume remains constant

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

D. Pressure is not constant

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20. The first law of thermodynamics deals with ____________

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21. The rate at which a substance takes part in a chemical reaction depends upon its ____________

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22. The higher the pH, the ___________ the acidity

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

A. instantaneous rate of the reaction

B. increase in concentration of the reactants

C. Average rate of the reaction

D. Change in concentration of the reactants with time

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

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

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

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

A. Volume

B. Mass

C. Density

D. Energy

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28. The conjugate base of HCl is __________

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

A. Not feasible

B. Moderate

C. Fast

D. Slow

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

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

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

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33. 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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34. Free energy change at equilibrium is ___________

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

A. enthalpy

B. entropy

C. free energy

D. work

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36. Rusting of iron Is an example of________ reaction

A. Slow

B. explosive

C. Fast

D. Moderate

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

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

A. H = E + PV

B. q = mCdT

C. dG = dH – TdS

D. dE = q + w

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

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40.

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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41. 1g of ice will occupy __________ space than 1g of water (less/more)

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42. Equilibrium is a state of dynamic molecular behaviour, meaning that ___________

A. reactants turn into products and products turn into reactants at different rates.

B. products continually turn into reactants at a progressively faster rate.

C. the reaction eventually comes to a stop.

D. reactants turn into products and products turn into reactants at equal rates

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

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

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

B. only exchange of energy with the surrounding is possible

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

D. only exchange of matter with the surrounding is possible

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45. Rate of reaction is defined as the __________

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

B. Rate of change of conc. of product only

C. None of the above

D. Rate of change of conc. of reactant only

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

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

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

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

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