Which of the following molecules has two other positional isomers?

a

CH3CH2Br

b

CH3CHBrCH3

c

CBr2F2

d

CH2CHBrCH2Br

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Explanation

Correct Option
d

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Discussions (17)

Som15432
1 year ago

Let's break down what "positional isomers" are and then look at each molecule!
* Isomers: These are molecules that have the same chemical formula but different arrangements of atoms.
* Positional Isomers: These are a specific type of isomer where the basic structure of the molecule stays the same, but the position of a functional group (like a bromine atom, Br) changes.
Now, let's look at each option:
* A. CH₃CH₂Br (Bromoethane):
* There's only one place the bromine can be on this two-carbon chain. So, it has no other positional isomers.
* B. CH₃CHBrCH₃ (2-bromopropane):
* If you move the Br to the end of the chain, you get 1-bromopropane. However, there is only one other possible position. So this only has one other positional isomer.
* C. CBr₂F₂ (Dibromodifluoromethane):
* This molecule has no other positional isomers. No matter how you switch the Bromine or Fluorine, the molecule is the same.
* D. CH₂BrCH₂CH₂Br (1,3-dibromopropane):
* This is the correct answer. You can move one of the bromine atoms to the middle carbon, creating 1,2-dibromopropane. So there are two positional isomers of this molecule.
Therefore, the molecule with two other positional isomers is D. CH₂BrCH₂CH₂Br.

sync
3 years ago

the question say " other two " apart from the one written, according to the explanation B is having only two isomers. so therefore the answer should be D.

Overwatch886
2 years ago

The question states, two other positional isomers meaning those apart from the ones written. Then our answer should be option D.

Myschool Nuel
1 year ago

Kindly ensure your questions are always updated on the Myschool App to get updated with the reviewed questions.
The question has been reviewed and correction made to be option D for over a fortnight ago. If your questions are not updated, you'll still be seeing the old answer.

If you're using the latest version, simply click on More at the home page of the myschool App, then click on App settings, then click on update, then click on update questions, then allow the system to update uninterruptedly.

Thank you

Tomkrush
3 years ago

Wrong

chloecleo
1 year ago

Incorrect answ

Som15432
1 year ago

The molecule with two other positional isomers is D) CH₂CHBrCH₂Br. Positional isomers are molecules with the same molecular formula but different arrangements of atoms or groups of atoms within the molecule. CH₂CHBrCH₂Br has two additional positional isomers: CHBrCH₂CH₂Br and CH₃CHBr₂CH₃. The other options have fewer than two other positional isomers.
CH₃CH₂Br has no other positional isomers.
CH₃CHBrCH₃ has no other positional isomers.
CBr₂F₂ has no other positional isomers.
Confirm and if wrong 👍

yes, we can have
1. 1,1 dibromo propane
2. 2,2 dibromo propane

what abt;
1, 3 dibromo propane 😎🤔🤔

Myschool Nuel
1 year ago

Apologies please!
Kindly note that correction has been effected.
Thank you all for your unrelenting efforts. It's well appreciated.

Som15432
1 year ago

I think My school made a mistake
The answer is D and not B

Owolabi446
3 months ago

there is no clarity in the explanations

FGCPOR17576703
3 years ago

It's actually 2-bromopropane not 1bromopropane

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