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 Carbon and Its Compounds 40 Flashcards |
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Which form of carbon is known as the hardest natural substance? |
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Diamond |
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True or False: Graphite is a good conductor of electricity. |
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True |
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Riddle: I am a form of carbon with 60 atoms, discovered in 1985, and have a spherical shape. What am I? |
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Buckminsterfullerene |
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The process of converting dead plants into coal over thousands of years is called ______. |
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Carbonisation |
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Which of the following is a characteristic of charcoal? A) It is a good conductor of electricity B) It is a black, porous solid C) It is highly soluble in water D) It is formed by burning wood in air |
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B) It is a black, porous solid |
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True or False: Carbon dioxide is a flammable gas. |
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False. Carbon dioxide is not flammable and does not support combustion. |
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What type of coal has the highest carbon content? |
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Anthracite |
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Fill-in-the-blanks: The study of organic compounds is called ______. |
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Organic chemistry |
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Which carbon compound is commonly used in fire extinguishers due to its non-combustible nature? |
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Carbon dioxide |
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Riddle: I am a black substance formed from the incomplete burning of hydrocarbons, used in paints and coatings. What am I? |
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Lampblack |
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True or False: Artificial diamonds can be created by heating carbon under high pressure. |
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True |
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What is the primary component of coal that makes it a significant energy source? |
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Carbon |
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Fill-in-the-blanks: The gaseous product formed when carbon burns in excess oxygen is ______. |
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Carbon dioxide |
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Which of the following forms of carbon is used as a lubricant in machinery? A) Diamond B) Graphite C) Coke D) Charcoal |
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B) Graphite |
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True or False: Carbon can form covalent bonds with many elements due to its valency. |
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True |
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What is the main use of activated charcoal? |
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As an absorbent and catalyst in chemical reactions |
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Fill-in-the-blanks: The black residue left after burning sugar shows that sugar contains ______. |
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Carbon |
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Which carbon allotrope is primarily used in jewelry? |
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Diamond |
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Riddle: I am a colorless gas that plants need to grow, but too much of me can cause suffocation. What am I? |
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Carbon dioxide (CO₂) |
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True or False: All carbon compounds are organic. |
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False. Carbon compounds can be organic or inorganic. |
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