Question

*Formalin is 40% aqueous solution of:*

1️⃣ Methanol
2️⃣ Ethanol
3️⃣ Methanal
4️⃣ Ethanal​

Answer 1

Formalin is 40% solution of formaldehyde which is other name of Methanal

Answer 2

Formalin is 40% aqueous solution of Methanal. (Option 3)

• Formalin can be defined as 40% aqueous solution of formaldehyde which is an organic compound.
• Formaldehyde is another name for methanal and contains aldehyde as the functional group. It is a pungent gas with molecular formula is HCHO.
• Formalin is commonly used as an antiseptic, disinfectant, and preservative for biological specimens.