Formalin is an aqueous solution of

Options

A. fluorescein
B. Formic acid
C. formaldehyde
D. furfuraldehdye

Answer

C

Explanation

The 40% solution of formaldehyde in water is sold in market under the name of formalin formaldehyde in the form of formalin (40% formaldehyde, 8% methanol and 52% water) is used for preserving biological specimens. Formaline solution also used as a disinfectants and commonly used in hardness and nail varnish.