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. Free energy change at equilibrium is ___________

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

A. Intensive

B. Open

C. Closed

D. Isolated

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3. The conjugate base of HCl is __________

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4. The ___________ law of thermodynamics discusses entropy.

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

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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 ___________ scale of temperature has absolute zero for its zero point

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8. 1g of ice will occupy __________ space than 1g of water (less/more)

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

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

A. entropy

B. enthalpy

C. work

D. free energy

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

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12. The first law of thermodynamics deals with ____________

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

A. Temperature of the reactants

B. All of these

C. Nature and concentration of the reactants

D. Catalyst

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

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15. There are ___________ laws of thermodynamics

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

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

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19.

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

A. increase in concentration of the reactants

B. instantaneous rate of the reaction

C. Change in concentration of the reactants with time

D. Average rate of the reaction

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

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22. 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. 8314 J/mol

B. 831.4 J/mol

C. 83.14 J/mol

D. 8.314 J/mol

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

A. Pressure is not constant

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

C. Volume remains constant

D. Takes place at constant temperature

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24. 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. none of the above

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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25. The higher the pH, the ___________ the acidity

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

A. the reaction eventually comes to a stop.

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

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

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

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28. Which of the following statements is correct?

A. both temperature and heat are extensive properties.

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

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

D. both temperature and heat are intensive properties

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

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30. 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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31. The first law of thermodynamics deals with _________

A. entropy

B. conservation of energy

C. thermodynamic equivalence

D. absolute zero temperature.

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

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

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

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

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36. 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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37. Which of the following statements describes an isolated system?

A. only exchange of matter with the surrounding is possible

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

C. only exchange of energy with the surrounding is possible

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

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

A. Density

B. Mass

C. Energy

D. Volume

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

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

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

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42. Only __________ substances can undergo electrolysis.

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

A. Moderate

B. Fast

C. Not feasible

D. Slow

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

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

A. H = E + PV

B. dG = dH – TdS

C. q = mCdT

D. dE = q + w

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46. Rusting of iron Is an example of________ reaction

A. Moderate

B. explosive

C. Fast

D. Slow

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

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48. The ___________ law of thermodynamics discusses entropy.

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

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

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