Q. If two compounds have the same empirical formula but different molecular formulae, they must have
A) Different percentage composition
B) Different molecular weights
C) Same viscosity
D) Same vapour density
Explanation
(b)
Since, the molecular formula is $n$ times the empirical formula, therefore, different compounds having the same empirical formula must have different molecular weights.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.