Introduction to Organic Chemistry
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Questions and Answers

What percentage of the Earth's crust is composed of carbon?

  • 10%
  • 25%
  • 0.9% (correct)
  • 75%

    • What percentage of all known compounds are organic compounds?

  • 85% (correct)
  • 65%
  • 50%
  • 75%

    • What are the two most abundant elements in the Earth's crust?

  • Hydrogen and helium
  • Carbon and oxygen
  • Nitrogen and sulfur
  • Oxygen and silicon (correct)

    • Approximately how many organic compounds have been discovered or synthesized?

    <p>10 million</p> Signup and view all the answers

    How many new organic compounds are reported each year?

    <p>10,000</p> Signup and view all the answers

    What is the main reason for studying carbon compounds as a separate discipline?

    <p>The sheer number of organic compounds</p> Signup and view all the answers

    What is the primary classification of hydrocarbons based on the type of bond between carbon atoms?

    <p>Saturated or unsaturated</p> Signup and view all the answers

    What is the general formula for alkanes?

    <p>CnH2n+2</p> Signup and view all the answers

    What is the difference between aliphatic and aromatic hydrocarbons?

    <p>Aliphatic hydrocarbons do not contain benzene rings, while aromatic hydrocarbons do</p> Signup and view all the answers

    What is the characteristic of aromatic hydrocarbons?

    <p>They contain a benzene ring with three alternating double bonds</p> Signup and view all the answers

    What is the characteristic of unsaturated hydrocarbons?

    <p>They contain at least a carbon – carbon double or triple bond</p> Signup and view all the answers

    What is the term used to describe hydrocarbons that contain only single bonds?

    <p>Paraffins</p> Signup and view all the answers

    What is the characteristic property of organic compounds that makes them combustible?

    <p>Presence of carbon and hydrogen atoms</p> Signup and view all the answers

    What is the main use of cellulose in plants?

    <p>To maintain structure</p> Signup and view all the answers

    Which of the following elements is NOT typically found in organic compounds?

    <p>Calcium</p> Signup and view all the answers

    What is the primary source of organic compounds?

    <p>Natural sources</p> Signup and view all the answers

    What is the most common alloy formed with iron and carbon?

    <p>Carbon steel</p> Signup and view all the answers

    Which type of compound is characterized by the presence of a triple bond between carbon atoms?

    <p>Alkyne</p> Signup and view all the answers

    What is the source of raw materials for many synthetic carbon polymers?

    <p>Crude oil</p> Signup and view all the answers

    What is graphite used for in the manufacturing process of glass?

    <p>As a molding material</p> Signup and view all the answers

    What is the study of carbon-containing molecules called?

    <p>Organic chemistry</p> Signup and view all the answers

    What is charcoal used for in the production of metals?

    <p>Iron smelting</p> Signup and view all the answers

    Which of the following is an example of an inorganic compound?

    <p>Na2CO3</p> Signup and view all the answers

    What is the primary use of crude oil in the petrochemical industry?

    <p>To produce gasoline and kerosene</p> Signup and view all the answers

    What are the three types of hydrocarbons mentioned in the text?

    <p>Alkanes, alkenes, and alkynes</p> Signup and view all the answers

    What is the function of nucleic acids in living organisms?

    <p>To transfer information from one generation to the next</p> Signup and view all the answers

    What is the characteristic that defines organic compounds?

    <p>Presence of carbon</p> Signup and view all the answers

    What is the primary source of power for living systems?

    <p>Amino acids and proteins</p> Signup and view all the answers

    Why is it important to study organic chemistry?

    <p>To understand the properties and uses of organic compounds</p> Signup and view all the answers

    Which of the following is NOT an organic compound?

    <p>Carbon dioxide</p> Signup and view all the answers

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