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