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Chemical Properties quiz #2 Flashcards

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Chemical Properties quiz #2
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  • Which association is not correct? a) Flammability - Fire b) Toxicity - Poison c) Corrosion - Rust d) Solubility - Insoluble
    d) Solubility - Insoluble. Solubility refers to the ability of a substance to dissolve, not being insoluble.
  • Which of the following is false?
    To determine which statement is false, one must evaluate the accuracy of each statement based on chemical principles and properties.
  • Which of the following associations is not correct? a) Flammability - Fire b) Toxicity - Poison c) Corrosion - Rust d) Solubility - Insoluble
    d) Solubility - Insoluble. Solubility refers to the ability of a substance to dissolve, not being insoluble.
  • Which of the following is not a correctly matched pair? a) Flammability - Fire b) Toxicity - Poison c) Corrosion - Rust d) Solubility - Insoluble
    d) Solubility - Insoluble. Solubility refers to the ability of a substance to dissolve, not being insoluble.
  • Do plants use oxygen?
    Yes, plants use oxygen during respiration, a process that occurs alongside photosynthesis.
  • Which of the following is a property of ammonium salts?
    Ammonium salts are typically soluble in water and can undergo chemical reactions such as decomposition.
  • To what extent do covalent compounds conduct electricity? Always, usually, rarely, or never?
    Covalent compounds rarely conduct electricity because they do not have free ions or electrons.
  • Which gas is most abundant in Earth's atmosphere?
    Nitrogen is the most abundant gas in Earth's atmosphere.
  • Consider the compound Al(OH)3. What type of solid does it form?
    Al(OH)3 forms an ionic solid with a crystal lattice structure.
  • Which is a chemical property of copper?
    Copper's ability to react with oxygen and form copper oxide (tarnishing) is a chemical property.
  • Which of these is most responsible for chemical reactions?
    The reactivity of substances is most responsible for chemical reactions.
  • Which indicator most likely suggests that a chemical change is taking place?
    Formation of bubbles or a color change suggests a chemical change is taking place.
  • Which of the following is a chemical property?
    Flammability is a chemical property.
  • What percentage of air is oxygen?
    Oxygen makes up about 21% of air.
  • Which of these terms describes the process of acid rain wearing away limestone?
    Corrosion describes acid rain wearing away limestone.
  • Which is a chemical property of vinegar?
    Vinegar's ability to react with baking soda to produce carbon dioxide is a chemical property.
  • Which of the following is not a form of precipitation?
    Fog is not a form of precipitation.
  • Are the noble gases reactive?
    Noble gases are generally unreactive.
  • Which one of the following would be a chemical property of a sample of neon gas?
    Neon's lack of reactivity is a chemical property.
  • Which observation does not indicate that a chemical reaction has occurred?
    A change in shape without a change in composition does not indicate a chemical reaction.
  • What characteristic of metals makes them good electrical conductors?
    Metals have mobile electrons that allow them to conduct electricity.
  • Which substance in the atmosphere absorbs most of the ultraviolet rays?
    Ozone absorbs most of the ultraviolet rays in the atmosphere.
  • Why does common table salt (NaCl) have a high melting point?
    NaCl has a high melting point due to strong ionic bonds between its ions.
  • What are the properties of ionic compounds?
    Ionic compounds have high melting points, are soluble in water, and conduct electricity when dissolved.
  • Which substance can be broken down by chemical means?
    Compounds can be broken down by chemical means.
  • An element's chemical properties and reactivity are based on which of the following?
    An element's chemical properties and reactivity are based on its electron configuration.
  • Which atom has a slightly positive charge in a single water molecule?
    The hydrogen atom has a slightly positive charge in a water molecule.
  • Baking soda and baking powder are examples of which of the following?
    Baking soda and baking powder are examples of chemical compounds.
  • What is the most abundant element in the human body?
    Oxygen is the most abundant element in the human body.
  • Which observation was a sign that a chemical reaction was occurring in this experiment?
    Formation of bubbles or a color change is a sign of a chemical reaction.
  • What is the most abundant gas in the Earth's atmosphere?
    Nitrogen is the most abundant gas in Earth's atmosphere.
  • Which substance cannot be broken down by chemical means?
    An element cannot be broken down by chemical means.
  • Which of the following are common features of chemical reactions?
    Common features include color change, gas formation, and formation of a new substance.
  • Which of the following describes a chemical property of a metal?
    A metal's ability to react with acids is a chemical property.
  • Which of the following is a property of an ionic compound?
    Ionic compounds conduct electricity when dissolved in water.
  • Which element is necessary in the formation of rust?
    Oxygen is necessary for the formation of rust.
  • Which of the following would indicate the formation of a new substance?
    A color change or gas formation indicates a new substance has formed.
  • Which process is an example of a chemical change?
    Rusting of iron is an example of a chemical change.
  • Which of the following is the only sure sign that a chemical change is taking place?
    Formation of a new substance is the only sure sign of a chemical change.
  • What is the purpose of a leavening agent?
    A leavening agent causes chemical reactions that produce gas, making baked goods rise.