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  4. Formalin is an aqueous solution of

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Q. Formalin is an aqueous solution of

AIPMTAIPMT 1988Aldehydes Ketones and Carboxylic Acids

Solution:

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.
Formalíne solution also used as a disinfectants and commonly used in hardeness and nail varnish.