9701 MCQ Solution 31

Question 31: [Organic > Introductory Organic]:

Which compounds have the empirical formula CH2O?

1 methanal

2 ethanoic acid

3 methyl methanoate

Reference: Past Exam Paper – November 2002 Paper 1 Q31

Solution 31:

Answer: A.

Methanal: 1^st degree aldehyde: HCHO: CH₂O

Ethanoic acid: 2^nd degree carboxylic acid: CH₃COOH: C₂H₄O₂: CH₂O

Methyl Methanoate: Ester: HCO₂CH₃: C₂H₄O₂: CH₂O

Thus since all correct option A is the correct choice