MHT CET20255 May 2025Evening ShiftChemistryGeneral Organic ChemistryActual
What is the number of moles of ' C ' and ' H ' atoms respectively present in n mole molecule represented by following structure ?
Options
- A6n and 6n
- B6n and 8n
- C8n and 8n
- D7n and 9n
Correct answer
C. 8n and 8n
Step-by-step solution
The molecular structure of styrene consists of a benzene ring bonded to a vinyl group. A benzene ring attached as a substituent contributes 6 carbon atoms and 5 hydrogen atoms, while the vinyl group -CH=CH₂ contributes 2 carbon atoms and 3 hydrogen atoms. Total carbon atoms: 6 + 2 = 8 Total hydrogen atoms: 5 + 3 = 8 The molecular formula is C8H8 . For n moles of styrene molecules, the number of moles of carbon atoms is 8 n = 8n , and the number of moles of hydrogen atoms is 8 n = 8n . Final answer: C