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 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. Thermodynamic energy

B. Threshold energy

C. Kinetic energy

D. Activation energy

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2. Which of the following statements is correct?

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

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

C. both temperature and heat are extensive properties.

D. both temperature and heat are intensive properties

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

A. Mass

B. Density

C. Volume

D. Energy

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

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

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

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

D. the reaction eventually comes to a stop.

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

A. Volume remains constant

B. Takes place at constant temperature

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

D. Pressure is not constant

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

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

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9. The conjugate base of HCl is __________

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

A. Change in concentration of the reactants with time

B. instantaneous rate of the reaction

C. Average rate of the reaction

D. increase in concentration of the reactants

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

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12. The first law of thermodynamics deals with ____________

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

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14. The ___________ law of thermodynamics discusses entropy.

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15. The ___________ law of thermodynamics discusses entropy.

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

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17. Only __________ substances can undergo electrolysis.

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18. Free energy change at equilibrium is ___________

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19. The higher the pH, the ___________ the acidity

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

A. All of these

B. Temperature of the reactants

C. Nature and concentration of the reactants

D. Catalyst

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

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

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

C. none of the above

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

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24. 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. 83.14 J/mol

B. 8.314 J/mol

C. 831.4 J/mol

D. 8314 J/mol

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25. 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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26. Rate of reaction generally ____________ with the rise of temperature.

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27. There are ___________ laws of thermodynamics

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

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

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

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34. 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 reactant only

C. Rate of change of conc. of product only

D. None of the above

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

A. work

B. free energy

C. entropy

D. enthalpy

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

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37. 1g of ice will occupy __________ space than 1g of water (less/more)

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

A. Slow

B. Fast

C. Not feasible

D. Moderate

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

A. Isolated

B. Closed

C. Intensive

D. Open

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

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

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

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

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

A. dG = dH – TdS

B. q = mCdT

C. H = E + PV

D. dE = q + w

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46. The first law of thermodynamics deals with _________

A. entropy

B. conservation of energy

C. thermodynamic equivalence

D. absolute zero temperature.

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

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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 concentration of reactants

C. Increasing the temperature

D. Increasing the activation energy

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

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