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Give simple chemical tests to distinguish between the following pairs of compounds : (i) Ethanal and propanal(ii) Benzoic acid and phenol. |
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Answer» SOLUTION :(i) Distinguish between Ethanal and PROPANAL `:` `CH_(3) CHO` and `CH_(3) CH_(2) CHO` Ethanal gives the iodoform test with `I_(2) //NaOH` whereas propanal does not. `CH_(3) CHO + 3NAOI rarr UNDERSET("Iodoform Yellow ppt.")(CHI_(3)) + HCOONa + 2NaOH` (ii) Distinction between Benzoic acid and phenol `:`  Benzoic acid gives an effervescence with a saturated solution bicarbonate while phenol does not. `underset("Benzoic acid")(C_(6) H_(5) COOH ) + NaHCO_(3) rarr underset("Sod. benzoate")(C_(6) H_(5) COONa) + CO_(2) + H_(2) O` |
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