Some Basic Principles Of Organic Chemistry Question 69

Question: An organic compound gave C = 92.31% and H=7.69 . If molecular weight of the compound is 78, its molecular formula is

Options:

A) C6H6

B) C7H7

C) C6H18

D) C8H20

Show Answer

Answer:

Correct Answer: A

Solution:

Element No.of Moles Simple Ratio
C = 92.31 92.31/12 = 7.69 1
H = 7.69 7.69/1 = 7.69 1

Hence, CH Empirical formula mass of CH = 13 n=Mol.massEmp.,mass=7813=6

Molecular formula = (CH)6=C6H6 .



NCERT Chapter Video Solution

Dual Pane