Organic Compounds with Oxygen Practice Questions
JEE · Chemistry · 1138 free MCQs with instant results and detailed explanations.
1138
Total
234
Easy
498
Medium
406
Hard
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Topics in Organic Compounds with Oxygen
Alcohols
172
Phenols
180
Ethers
174
Aldehydes and Ketones
174
Carboxylic Acids
149
Named Reactions
151
Distinguishing Tests
138
Sample Questions from Organic Compounds with Oxygen
Here are 10 sample questions. Start a quiz to get randomized questions with scoring.
Q1
Easy
Which of the following statements about alcohols is incorrect?
A.
Alcohols can form hydrogen bonds.
B.
Alcohols are generally soluble in water.
C.
Alcohols have higher boiling points than alkanes.
D.
Alcohols always have a higher molecular weight than ethers.
Show Answer & Explanation
Correct Answer: D
Alcohols do not always have a higher molecular weight than ethers, especially when comparing small alcohols and ethers.
Q2
Easy
What is the IUPAC name of the compound CH3-CH2-CH(OH)-CH3?
A.
Butan-2-ol
B.
Propan-1-ol
C.
Butan-1-ol
D.
Butan-3-ol
Show Answer & Explanation
Correct Answer: A
The compound has four carbon atoms, with the hydroxyl group on the second carbon, making it butan-2-ol.
Q3
Easy
Which alcohol is classified as a primary alcohol?
A.
2-Methylpropan-2-ol
B.
Butan-1-ol
C.
Pentan-2-ol
D.
Benzyl alcohol
Show Answer & Explanation
Correct Answer: B
Butan-1-ol has the hydroxyl group attached to the terminal carbon, classifying it as a primary alcohol.
Q4
Medium
Which alcohol can undergo oxidation to form a ketone?
A.
Methanol
B.
Ethanol
C.
Propan-2-ol
D.
Butanol
Show Answer & Explanation
Correct Answer: C
Propan-2-ol is a secondary alcohol and can be oxidized to form a ketone (acetone).
Q5
Medium
Which reaction converts an alcohol into an alkene?
A.
Hydrolysis
B.
Dehydration
C.
Oxidation
D.
Reduction
Show Answer & Explanation
Correct Answer: B
Dehydration of alcohols involves the removal of water to form alkenes, typically under acidic conditions.
Q6
Medium
Which of the following statements is true about alcohols?
A.
All alcohols are soluble in water.
B.
Alcohols cannot form hydrogen bonds.
C.
Higher molecular weight alcohols are less soluble in water.
D.
Alcohols do not have a hydroxyl group.
Show Answer & Explanation
Correct Answer: C
Higher molecular weight alcohols have a larger hydrophobic part, reducing their solubility in water.
Q7
Medium
What is the product of the reaction between ethanol and concentrated sulfuric acid at high temperature?
A.
Ethylene
B.
Ethyl sulfate
C.
Diethyl ether
D.
Ethanoic acid
Show Answer & Explanation
Correct Answer: A
When ethanol reacts with concentrated sulfuric acid at high temperatures, it undergoes dehydration to produce ethylene.
Q8
Hard
Which of the following alcohols has the highest boiling point due to hydrogen bonding?
A.
1-Butanol
B.
2-Butanol
C.
Tert-Butanol
D.
Ethylene glycol
Show Answer & Explanation
Correct Answer: D
Ethylene glycol has two hydroxyl groups that can form extensive hydrogen bonds, leading to a significantly higher boiling point than the other alcohols listed.
Q9
Hard
Which reagent can be used to convert a primary alcohol into an aldehyde?
A.
PCC (Pyridinium chlorochromate)
B.
KMnO4
C.
H2SO4
D.
NaBH4
Show Answer & Explanation
Correct Answer: A
PCC selectively oxidizes primary alcohols to aldehydes without further oxidation to carboxylic acids, making it the appropriate choice.
Q10
Hard
What is the product of the reaction between phenol and an excess of hydrogen bromide?
A.
Bromobenzene
B.
Bromophenol
C.
Bromocyclohexane
D.
Cresol
Show Answer & Explanation
Correct Answer: A
An excess of hydrogen bromide can substitute the hydroxyl group in phenol, leading to the formation of bromobenzene due to electrophilic aromatic substitution.
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Organic Compounds with Oxygen — JEE Chemistry Practice Questions Online
This page contains 1138 practice MCQs for the chapter Organic Compounds with Oxygen in JEE Chemistry. The questions are organized by difficulty — 234 easy, 498 medium, 406 hard — so you can choose the right level for your preparation.
Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit. This chapter covers 7 topics, giving you comprehensive coverage of the entire chapter.