Question

Which of the following organic compound is used to preserve biological specimen?

• A. $HCHO$
• B. $C{H}_{3}COOH$
• C. $HCOOH$
• D. $C{H}_{3}C{H}_{2}OH$

Answer 1

Answer: (A)

$HCHO$

Formalin is 40% aqueous solution of HCHO which is a pungent gas and used as an antiseptic, disinfectant and as a fixative for histology preserving the biological specimen in laboratories. In it, the tissues are preserved to study under the microscope.