give a chemical test to distinguish between methanal and propanal
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Iodofrom is the chemical test to distinguish between Ethanal and propanal.
Explanation:
The chemical test which distinguishes ethanal from propanal is iodoform test.
Iodoform test is used to detect the presence of carbonyl compounds having structure and alcohols having structure .
To carry out positive iodoform test, it is necessary to have a methy ketone or methyl alcohol.
The formula for ethanal is . As ethanal has a methyl group attached to the CHO, therefore it will give a positive iodoform test.
Whereas the formula for propanal is . As there is no attached to the CHO so, it will not give iodoform test.
Thus, iodofrom is the chemical test to distinguish between Ethanal and propanal.
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