(i) On treatment with dilute alkali, ethanal produces 3-hydroxybutanal gives butane- 1, 3-diol on reduction.
(ii) On treatment with dilute alkali, ethanal gives 3-hydroxybutanal which on heating
produces but-2-enal.
(iii) When treated with Tollen’s reagent, But-2-enal produced in the above reaction
produces but-2-enoic acid .
