MHT CET202015 Oct 2020Evening ShiftChemistrySome Basic Concepts of ChemistryActual
An organic compound was found to contain 40.0 % C and 6.66 % H . Find it's molecular formula (molar mass =180 )
Options
- AC ₂₂ H ₂₄ O ₁₁
- BC ₂ H ₄ O ₂
- CCH ₂ O
- DC ₆ H ₁₂ O ₆
Correct answer
D. C ₆ H ₁₂ O ₆
Step-by-step solution
For this we make a table as: array |c|c|c|c|c| Elemen & %Compositio & Atomic & Mole & Simple Ratio t & n & Mass & Ratio & C & 40.00 % & 12 & (40 / 12) & (3 33 / 3 33)=1 H & 6.67 % & 1 & (6.67 / 1) & (6.667 / 3 33)=2 O & 53.33 % & 16 & (53 33 / 16 & (3 33 / 3 33)=1 array Formula of compound is = CH ₂ O Molecular formula mass =180 Empirical formula mass =12+2+16=30 n =180 / 30=6 Therefore, molecular formula = empirical formula 6= C ₆ H ₁₂ O ₆