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

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2. The ___________ law of thermodynamics discusses entropy.

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

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

A. Isolated

B. Closed

C. Intensive

D. Open

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

A. Catalyst

B. Temperature of the reactants

C. All of these

D. Nature and concentration of the reactants

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

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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 _____________

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8. Which of the following statements is correct?

A. both temperature and heat are intensive properties

B. both temperature and heat are extensive properties.

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

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

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

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

A. dE = q + w

B. H = E + PV

C. q = mCdT

D. dG = dH – TdS

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

A. only exchange of matter with the surrounding is possible

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

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

D. only exchange of energy with the surrounding is possible

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12. The first law of thermodynamics deals with _________

A. absolute zero temperature.

B. entropy

C. thermodynamic equivalence

D. conservation of energy

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

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

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

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

A. increase in concentration of the reactants

B. Average rate of the reaction

C. instantaneous rate of the reaction

D. Change in concentration of the reactants with time

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

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

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

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

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

D. the reaction eventually comes to a stop.

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

A. Takes place at constant temperature

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

C. Volume remains constant

D. Pressure is not constant

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

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21. There are ___________ laws of thermodynamics

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

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

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

A. Increasing the concentration of reactants

B. Using a catalyst

C. Increasing the activation energy

D. Increasing the temperature

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

A. Slow

B. Moderate

C. Not feasible

D. Fast

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

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

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

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

D. none of the above

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28.

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

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30. Only __________ substances can undergo electrolysis.

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

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32. 1g of ice will occupy __________ space than 1g of water (less/more)

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

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

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

A. Mass

B. Density

C. Energy

D. Volume

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36. 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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37. The higher the pH, the ___________ the acidity

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

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39. Free energy change at equilibrium is ___________

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40. 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. 83.14 J/mol

C. 831.4 J/mol

D. 8.314 J/mol

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41. Rusting of iron Is an example of________ reaction

A. explosive

B. Moderate

C. Slow

D. Fast

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

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

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44. 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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45. The first law of thermodynamics deals with ____________

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46. The conjugate base of HCl is __________

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47. Rate of reaction is defined as the __________

A. Rate of change of conc. of reactant only

B. None of the above

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

D. Rate of change of conc. of product only

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

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

A. enthalpy

B. free energy

C. work

D. entropy

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50. 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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