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How will youdistinguish between benzalde...

How will youdistinguish between benzaldehyde andacetaldehyde?

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Out of the two acetaldehyde gives iodoform test. It gives a yellow ppt. of iodoform `(CHI_(3))` when warmed with `I_(2) + NaOH`.
`I_(2) + 2NaOH rarr NaOI + NaI + H_(2)O`
`CH_(3)CHO + 3NaOI rarr Cl_(3)CHO + 3NaOH`
`NaOH + Cl_(3)CHO rarr underset("(Yellow ppt.)")(CHI_(3)) + HCOONa`
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