Question : 71. Which of the following not an example of a : 1335379

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71. Which of the following is not an example of a physical property?

A)The boiling point of liquid nitrogen is 77 K.

B)Nitrogen is a gas at room temperature.

C)Nitrogen is colorless.

D)Nitrogen gas is less dense than oxygen gas.

E)Nitrogen combines with oxygen in an internal combustion engine to form oxides of nitrogen.

72. Which of the following is not an example of a chemical property?

A)An iron nail will rust in water.

B)Sugar will dissolve in water.

C)A steak on a hot frying pan will turn brown.

D)Gasoline will burn if ignited.

E)Water can be decomposed to hydrogen and oxygen.

73. Which of the following is not an example of a chemical change?

A)Water becomes purple as Kool-aid is dissolved in it.

B)Aluminum turns white after prolonged exposure to air.

C)A piece of charcoal becomes white after it burns.

D)Magnesium burns in air to make magnesium oxide.

E)Zinc metal reacts with hydrochloric acid to form zinc chloride and hydrogen gas.

74. Which of the following is not an example of a physical change?

A)Ice melts when warmed.

B)Dry ice sublimes (converts from a solid to a gas) at room temperature.

C)Liquid nitrogen converts to a gas at room temperature.

D)Blue copper sulfate crystals dissolve in water to form a blue solution.

E)When hydrogen and oxygen gas are mixed in the presence of a spark, water is formed.

75. Which of the following is not a form of energy?

A) chemical B) mechanical C) temperature D) heat E) electrical

76. Which of the following statements is incorrect?

A)Energy is the capacity to do work or transfer heat.

B)Mechanical work occurs when a force acts over a distance.

C)Kinetic energy is the energy possessed by an object due to its position.

D)Potential energy can be possessed by chemical compounds.

E)A compound releases potential energy when it undergoes a spontaneous chemical reaction.

77. Which of the following statements is incorrect?

A)H2 molecules which are moving faster must have more kinetic energy than slower moving H2 molecules.

B)A book stored on a high bookshelf has potential energy.

C)A volleyball flying over a net has both kinetic energy and potential energy.

D)When gasoline is burned to power an engine, it releases only potential energy.

E)The water in a waterfall has kinetic, potential, and mechanical energy.

78. Which of the following is not a practice that would be employed by a scientist?

A)testing ideas by experimentation

B)organizing findings in specific ways

C)predicting the outcome of an experiment and then not testing the prediction

D)trying to explain why things happen

E)making physical models to explain the behavior of matter

79. Which of the following is not normally a part of scientific inquiry?

A) observations B) philosophizing C) theories D) hypotheses E) laws

80. Which of the following statements is incorrect?

A)The scientific method is a way of looking at the world that is different from non-science forms of inquiry.

B)The scientific method does not allow for the use of inferences, and everything must be proved by direct observation.

C)A theory is a tentative explanation of the behavior or properties of matter.

D)Scientists must isolate and study one variable at a time when performing experiments.

E)A behavior of matter that has universal validity is called a law.

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July 1, 2023

61. Which of the following statements regarding intermolecular forces is incorrect?

A)Hydrogen bonding is the strongest of the intermolecular forces.

B)London dispersion forces increase with increasing molecular size.

C)Dipole-dipole forces are present in all atoms and molecules.

D)In order for a pure substance to participate in hydrogen bonding, it must have hydrogen bonded to F, O, or N.

E)Intermolecular forces are much weaker than bonding forces.

62. Which of the following statements regarding intermolecular forces is incorrect?

A)Hydrogen bonding is the strongest of the intermolecular forces for substances of similar molar mass.

B)London dispersion forces are present in all atoms and molecules.

C)Dipole-dipole forces increase with increasing molecular size.

D)Bonding forces are much stronger than intermolecular forces.

E)Hydrogen bonding is the reason for the abnormally high boiling point of water.

63. Which choice correctly lists the intermolecular forces present in CH3NH2?

A)London forces only

B)dipole-dipole forces only

C)London forces, dipole-dipole forces, and hydrogen bonding

D)dipole-dipole forces and hydrogen bonding

E)hydrogen bonding only

64. Which choice correctly lists the intermolecular forces present in CH4?

A)London forces only

B)London forces and dipole-dipole forces

C)London forces, dipole-dipole forces, and hydrogen bonding

D)dipole-dipole forces and hydrogen bonding

E)London forces and hydrogen bonding

65. Which choice correctly lists the intermolecular forces present in CH3Br?

A)London forces only

B)London forces and dipole-dipole forces

C)London forces, dipole-dipole forces, and hydrogen bonding

D)dipole-dipole forces and hydrogen bonding

E)London forces and hydrogen bonding

66. Arrange the following substances in order of increasing boiling point: CH3OH, CH4, CH3CH2OH, HOCH2CH2OH

A)CH3OH < CH4 < CH3CH2OH < HOCH2CH2OH B)CH4 < CH3OH < CH3CH2OH < HOCH2CH2OH C)CH4 < CH3OH < HOCH2CH2OH < CH3CH2OH D)CH3OH < CH4 < HOCH2CH2OH < CH3CH2OH E)HOCH2CH2OH < CH3CH2OH < CH3OH < CH4 67. Arrange the following substances in order of increasing boiling point: N2, H2, NH3, PH3 A)H2 < N2 < PH3 < NH3D)N2 < PH3 < NH3 < H2 B)N2 < H2 < PH3 < NH3E)NH3 < PH3 < N2 < H2 C)H2 < N2 < NH3 < PH3 68. Select the pair of substances which has the one with the higher equilibrium vapor pressure at a given temperature listed first. A)H2O, H2SD)NH3, PH3 B)CH3CH2OH, CH3OHE)Br2, Cl2 C)CH3COCH3, CH3CH2CH2OH 69. Select the pair of substances which has the one with the higher equilibrium vapor pressure at a given temperature listed first. A)H2O, HClD)AsH3, PH3 B)CH3OH, CH4E)Cl2, Br2 C)CH3CH2CH2OH, CH3COCH3 70. Which of the following statements regarding the liquid state is incorrect? A)Liquids are about 1000 times denser than gases. B)Liquids are normally about 90-95% as dense as their corresponding solid. C)The viscosity of a liquid is a measure of its resistance to flow. D)Molecules with high intermolecular forces will have high surface tension. E)Surface tension increases as temperature increases.