How many isomers are there for C3H6Cl2?
(A) 3
(B) 4
(C) 5
(D) 6 - HSC - SSCE Chemistry - Question 5 - 2006 - Paper 1
Question 5
How many isomers are there for C3H6Cl2?
(A) 3
(B) 4
(C) 5
(D) 6
Worked Solution & Example Answer:How many isomers are there for C3H6Cl2?
(A) 3
(B) 4
(C) 5
(D) 6 - HSC - SSCE Chemistry - Question 5 - 2006 - Paper 1
Step 1
Step 1: Identify Possible Isomers
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Answer
To determine the number of isomers for the molecular formula C₃H₆Cl₂, we can start by recognizing the types of structural isomers possible. Considering the arrangement of carbon and the presence of chlorine atoms, we focus on the potential backbone configurations of three carbon atoms.
Step 2
Step 2: Structural Arrangements
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Answer
For C₃H₆Cl₂, we consider:
Straight-chain isomers: There is one straight-chain form of propane.
Branched isomers: Possible branch arrangements can lead to different isomers by varying the positions of the chlorine atoms.
Step 3
Step 3: Identifying Isomers
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Answer
Examine the chlorination:
There are two chlorines, which can be positioned at different carbon atoms:
Both on the same carbon (1,1-dichloropropane)
Both on different carbons (1,2-dichloropropane and 1,3-dichloropropane)
There can also be a 2,2-dichloropropane isomer.
Step 4
Step 4: Counting Isomers
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Answer
Summarizing these, we arrive at the following distinct isomers:
1,1-Dichloropropane
1,2-Dichloropropane
1,3-Dichloropropane
2,2-Dichloropropane
This gives us a total of 4 distinct isomers.
Step 5
Final Answer: Choose the Correct Option
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Answer
Based on the analysis above, the correct answer is (B) 4.
