Q. How many moles of carbon are in 24 grams of carbon dioxide?
-
A.
1 mole
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B.
2 moles
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C.
0.5 moles
-
D.
3 moles
Solution
The molar mass of CO2 is 44 g/mol. Therefore, 24 g of CO2 contains 24 g / 44 g/mol = 0.545 moles of CO2, which corresponds to 0.545 moles of carbon.
Correct Answer:
B
— 2 moles
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Q. If 10 grams of carbon are burned in excess oxygen, how many grams of carbon dioxide are produced?
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A.
22 grams
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B.
30 grams
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C.
44 grams
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D.
10 grams
Solution
The reaction is C + O2 -> CO2. The molar mass of C is 12 g/mol and CO2 is 44 g/mol. 10 g of C produces (10 g / 12 g/mol) * 44 g/mol = 36.67 g of CO2.
Correct Answer:
C
— 44 grams
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Q. What is the IUPAC name of CH3-CH2-COOH?
-
A.
Propanoic acid
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B.
Butanoic acid
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C.
Acetic acid
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D.
Ethanoic acid
Solution
The compound CH3-CH2-COOH is propanoic acid, as it has three carbon atoms.
Correct Answer:
A
— Propanoic acid
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Q. What is the main product when methane reacts with chlorine in the presence of UV light?
-
A.
Chloroform
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B.
Methyl chloride
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C.
Carbon tetrachloride
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D.
Ethane
Solution
The main product of the reaction between methane and chlorine in UV light is methyl chloride (CH3Cl).
Correct Answer:
B
— Methyl chloride
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Q. What is the molecular formula of ethylene?
-
A.
C2H4
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B.
C2H6
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C.
C2H2
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D.
C2H8
Solution
Ethylene is an alkene with the molecular formula C2H4.
Correct Answer:
A
— C2H4
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Q. What is the product of the reaction between ethene and bromine?
-
A.
Bromethane
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B.
Dibromoethane
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C.
Ethane
-
D.
Bromoethane
Solution
The reaction of ethene (C2H4) with bromine (Br2) produces dibromoethane (C2H4Br2).
Correct Answer:
B
— Dibromoethane
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Q. Which of the following compounds is a saturated hydrocarbon?
-
A.
C2H2
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B.
C3H6
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C.
C4H10
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D.
C5H8
Solution
C4H10 (butane) is a saturated hydrocarbon, while the others are unsaturated.
Correct Answer:
C
— C4H10
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Q. Which of the following is a characteristic of carbon compounds?
-
A.
They are all gases
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B.
They are all soluble in water
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C.
They can form long chains
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D.
They are all ionic
Solution
Carbon compounds can form long chains due to the tetravalent nature of carbon.
Correct Answer:
C
— They can form long chains
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Q. Which of the following is a property of carbon compounds?
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A.
High melting points
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B.
Soluble in water
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C.
Conduct electricity
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D.
Form covalent bonds
Solution
Carbon compounds typically form covalent bonds due to the nature of carbon's bonding.
Correct Answer:
D
— Form covalent bonds
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Q. Which of the following is an example of an aromatic compound?
-
A.
Cyclohexane
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B.
Benzene
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C.
Ethylene
-
D.
Propylene
Solution
Benzene is an aromatic compound characterized by its ring structure and delocalized electrons.
Correct Answer:
B
— Benzene
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