Chemical Properties quiz #2 Flashcards
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.
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