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 first law of thermodynamics deals with ____________

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

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3. 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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4. The ___________ law of thermodynamics discusses entropy.

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

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

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7. 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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8. Which of the following is not a state function?

A. free energy

B. enthalpy

C. entropy

D. work

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

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10. The conjugate base of HCl is __________

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11. Free energy change at equilibrium is ___________

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12. 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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13. There are ___________ laws of thermodynamics

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14. The higher the pH, the ___________ the acidity

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

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

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17. Which of the following statements is correct?

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

B. both temperature and heat are intensive properties

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

D. both temperature and heat are extensive properties.

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

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

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

C. only exchange of matter with the surrounding is possible

D. only exchange of energy with the surrounding is possible

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

A. instantaneous rate of the reaction

B. Change in concentration of the reactants with time

C. Average rate of the reaction

D. increase in concentration of the reactants

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

A. Fast

B. Moderate

C. Slow

D. Not feasible

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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 _____________

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

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

A. Pressure is not constant

B. Volume remains constant

C. Takes place at constant temperature

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

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

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26. The ___________ law of thermodynamics discusses entropy.

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27. The first law of thermodynamics deals with _________

A. thermodynamic equivalence

B. absolute zero temperature.

C. conservation of energy

D. entropy

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

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29. Only __________ substances can undergo electrolysis.

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

A. H = E + PV

B. dE = q + w

C. q = mCdT

D. dG = dH – TdS

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

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

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34. Rusting of iron Is an example of________ reaction

A. Moderate

B. explosive

C. Slow

D. Fast

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35. Rate of reaction is defined as the __________

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

B. None of the above

C. Rate of change of conc. of product only

D. Rate of change of conc. of reactant only

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

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

B. the reaction eventually comes to a stop.

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

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

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37. 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. Activation energy

D. Kinetic energy

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

A. Volume

B. Density

C. Energy

D. Mass

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39. A substance that is capable of acting as both an acid and as a base 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. Milk sours more rapidly in summer than in winter because ____________

A. none of the above

B. in winter, number of molecules per unit volume increases 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 summer, the temperature Is high due to which effective collisions increase and hence the rate of reaction becomes fast

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

A. Increasing the concentration of reactants

B. Increasing the temperature

C. Using a catalyst

D. Increasing the activation energy

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

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

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

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47. 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. 831.4 J/mol

B. 8314 J/mol

C. 8.314 J/mol

D. 83.14 J/mol

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

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

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

A. Intensive

B. Closed

C. Isolated

D. Open

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