given the compound: which structural formula represents an isomer? a) b) c) d)

Answer

Explanation:

Step1: Recall isomer definition

Isomers have same molecular - formula but different structures. The given compound has 3 carbon atoms, 6 hydrogen atoms, and 2 chlorine atoms ($C_3H_6Cl_2$).

Step2: Analyze option A

Option A has 4 carbon atoms ($C_4H_8Cl_2$), so it is not an isomer.

Step3: Analyze option B

Option B has 3 carbon atoms, 6 hydrogen atoms, and 2 chlorine atoms ($C_3H_6Cl_2$) and a different structure from the given compound, so it is an isomer.

Step4: Analyze option C

Option C has 3 carbon atoms, 7 hydrogen atoms, and 1 chlorine atom ($C_3H_7Cl$), so it is not an isomer.

Step5: Analyze option D

Option D has 4 carbon atoms ($C_4H_8Cl_2$), so it is not an isomer.