Question

Which of the following statements concerning `3,4`-dibromo-`1`-pentane and `3,5`-dibromo-`2`-pentane are correct?
(I) They have same molecular formula `C_(5)H_(8)Br_(2)`
(II) They are positional isomers.
(III) They have similar chemical properties.
A. `I` and `III`
B. `I` and `II`
C. `II` and `III`
D. `I,II` and `III`

Answer 1

Correct Answer - B
They are positional isomers, hence same molecular formula `C_(5)H_(8)Br_(2)`. However, they are structure isomers, hence different physical and chemical properties.