Which of the following compounds is used for preserving biological specimens?

Ethyl alcohol

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Formaldehyde

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Acetaldehyde

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Acetone

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Solution

The correct option is B Formaldehyde
Formaldehyde (HCHO) in the form of formalin (40% solution of formaldehyde) is used for preserving biological specimens. Hence, the correct answer is option (b).

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Preservative for biological specimens is one of the use of:

An organic compound having the molecular formula $C_{3} H_{6} O$ can exist in the form of two isomers A and B having different functional groups. The isomer A is a liquid which is used as a solvent for nail polish. The isomer B is also a liquid. An aqueous solution of one of the lower homologues of B is used for preserving biological specimens in the laboratory
(a) What is compound A?
(b) Write the electron-dot structure of A.
(c) What is compound B?
(d) Write the electron-dot structure of B.
(e) Name the lower homologue of compound B which is used in preserving biological specimens.

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Which of the following compounds is used for preserving biological specimens?

The correct option is B FormaldehydeFormaldehyde (HCHO) in the form of formalin (40% solution of formaldehyde) is used for preserving biological specimens. Hence, the correct answer is option (b).

The correct option is B Formaldehyde
Formaldehyde (HCHO) in the form of formalin (40% solution of formaldehyde) is used for preserving biological specimens. Hence, the correct answer is option (b).