Question

In which of the following cases is the empirical formula the same as the molecular formula?

• A. C₁₂H₂₂O₁₁
• B. C₆H₆
• C. C₃H₅COOH
• D. C₆H₁₂O₆

Answer 1

The correct option is A

C₁₂H₂₂O₁₁

The correct answer is option (A).

Explanation for the correct option(A):

• Molecular formula Explanation for the correct option(A):of Sucrose is C₁₂H₂₂O₁₁.
• Empirical formula denotes the simplest whole-number ratio of the atoms of each different element.
• C₁₂H₂₂O₁₁ is the correct answer as it has the same empirical and molecular formula , because in Sucrose is C₁₂H₂₂O₁₁ there is no number that is a devisor to all the three subscripts (12,22,11) that will produce a whole-number. The formula can not be reduced further.
• Hence option (A) is the correct answer

Explanation for incorrect option (B):

• Molecular formula of Benzene is C6H6
• Empirical formula of benzene is CH

Explanation for incorrect option (C):

• Molecular formula of Butanoic acid is C₃H₅COOH
• Empirical formula of Butanoic acid is C₂H₃O

Explanation for incorrect option (D):

• Molecular formula of Glucose C₆H₁₂O₆
• Empirical formula of benzene is CH₂O

Hence the correct answer is Option (A).