Question:
Which of the following are chiral molecules? I. Pentan-3-ol, II. 3-Methylheptane, III. 3-Bromo-3-methylpentane, IV. 3-Bromo-2-methylpentane
Which of the following are chiral molecules? I. Pentan-3-ol, II. 3-Methylheptane, III. 3-Bromo-3-methylpentane, IV. 3-Bromo-2-methylpentane
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Look for the carbon attached to 4 unique groups!
Updated On: Jun 6, 2026
- I, II, III only
- II, IV only
- II, III only
- I, II only
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The Correct Option is B
Solution and Explanation
Step 1: Concept
Chirality requires a carbon atom attached to four different groups.
Step 2: Meaning
I is achiral (symmetrical). II (3-Methylheptane) has a chiral center at C3. III is achiral (two ethyl groups). IV (3-Bromo-2-methylpentane) has a chiral center at C3.
Step 3: Analysis
II and IV have chiral centers.
Step 4: Conclusion
II and IV are chiral.
Final Answer: (B)
Chirality requires a carbon atom attached to four different groups.
Step 2: Meaning
I is achiral (symmetrical). II (3-Methylheptane) has a chiral center at C3. III is achiral (two ethyl groups). IV (3-Bromo-2-methylpentane) has a chiral center at C3.
Step 3: Analysis
II and IV have chiral centers.
Step 4: Conclusion
II and IV are chiral.
Final Answer: (B)
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