Formalin is:

Aqueous solution of HCHO and

C H_{3} C H O

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Alcoholic solution of formaldehyde

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40 %

aqueous solution of formic acid

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40 %

aqueous solution of formaldehyde

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Solution

The correct option is D $40 %$ aqueous solution of formaldehyde
$F o r m a l i n$ is 40% aqueous solution of $f o r m a l d e h y d e$ . It also contains 8% $C H_{3} O H$ and 52% $w a t e r$ .

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In dilute aqueous solution, formaldehyde exists as ?

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