Question -
Answer -
i) Butane-1, 3-diol (ii) But-2-enal (iii) But-2-enoic acid
Answer
(i) Ontreatment with dilute alkali, ethanal produces 3-hydroxybutanal gives butane-1,3-diol on reduction.

(ii) Ontreatment with dilute alkali, ethanal gives 3-hydroxybutanal which on heatingproduces but-2-enal.

(iii) Whentreated with Tollen’s reagent, But-2-enal produced in the above reaction producesbut-2-enoic acid .
