Organic Chemistry Basics
Q. What is the functional group present in alcohols? (2023) 2023
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A.
Aldehyde
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B.
Ketone
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C.
Hydroxyl
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D.
Carboxylic acid
Solution
Alcohols contain a hydroxyl (-OH) functional group.
Correct Answer: C — Hydroxyl
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Q. What is the main product when ethene reacts with bromine?
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A.
Bromethane
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B.
1,2-Dibromoethane
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C.
Ethane
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D.
Bromoethane
Solution
The reaction of ethene with bromine results in the formation of 1,2-dibromoethane.
Correct Answer: B — 1,2-Dibromoethane
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Q. What type of bond is present in a carbon-carbon double bond?
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A.
Single bond
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B.
Double bond
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C.
Triple bond
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D.
Quadruple bond
Solution
A carbon-carbon double bond consists of one sigma bond and one pi bond, making it a double bond.
Correct Answer: B — Double bond
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Q. What type of reaction is involved in the conversion of an alkene to an alkane? (2023)
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A.
Hydrogenation
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B.
Dehydration
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C.
Halogenation
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D.
Oxidation
Solution
Hydrogenation is the process of adding hydrogen to an alkene to convert it into an alkane.
Correct Answer: A — Hydrogenation
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Q. What type of reaction occurs when an alkene reacts with hydrogen? (2023) 2023
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A.
Hydrolysis
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B.
Hydrogenation
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C.
Dehydration
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D.
Oxidation
Solution
The reaction of an alkene with hydrogen is called hydrogenation.
Correct Answer: B — Hydrogenation
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Q. Which compound is a carboxylic acid? (2023)
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A.
CH3COOH
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B.
C2H5OH
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C.
C3H6
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D.
C4H10
Solution
CH3COOH (acetic acid) is a carboxylic acid, containing the -COOH functional group.
Correct Answer: A — CH3COOH
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Q. Which compound is a saturated hydrocarbon? (2023)
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A.
Ethylene
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B.
Propylene
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C.
Hexane
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D.
Benzene
Solution
Hexane is a saturated hydrocarbon, containing only single bonds between carbon atoms.
Correct Answer: C — Hexane
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Q. Which compound is a saturated hydrocarbon? (2023) 2023
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A.
Ethylene
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B.
Propane
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C.
Benzene
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D.
Butyne
Solution
Propane is a saturated hydrocarbon, containing only single bonds between carbon atoms.
Correct Answer: B — Propane
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Q. Which of the following compounds is an isomer of butanol?
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A.
2-Butanol
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B.
1-Butanol
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C.
Butyric acid
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D.
Butene
Solution
2-Butanol is an isomer of butanol, differing in the position of the hydroxyl group.
Correct Answer: A — 2-Butanol
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Q. Which of the following is an example of an alkene? (2023)
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A.
Ethane
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B.
Propene
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C.
Butane
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D.
Cyclohexane
Solution
Propene is an alkene, characterized by a carbon-carbon double bond.
Correct Answer: B — Propene
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Q. Which of the following is an example of an alkene? (2023) 2023
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A.
Ethane
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B.
Propene
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C.
Butane
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D.
Cyclohexane
Solution
Propene is an alkene, characterized by a carbon-carbon double bond.
Correct Answer: B — Propene
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