Example of condensation polymer is:
(A)Formaldehyde `rightarrow` meta - formaldehyde
(B) Acetaldehyde `rightarrow` para - aldehyde
(C) Acetone `rarr` mesityl oxide
(D) Ethene `rightarrow` polyethene

Convert the following : (a) ethanal to propanone (b ) ethanal to lactic acid (c ) Ethanal to 2-hydroxybut -3-enoic acid (d ) Acetaldehyde to formaldehyde. (e ) formaldehyde to acetaldehyde (f ) Acetaldehyde to crotonic acid .

(i) Givean industrial preparation of (a) formaldehyde, (b) acetaldehyde and (c) acetone (ii) Give the methods by which ethyl alcohol may be converted into acetaldehyde (iii) How is an aldehyde obtained from an acid chloride? (iv) Write an equation for making aldehydes by the oxo process. (v) How is impure acetaldehyde purified? ltbr (vi) How is impure acetone purified?

For the given reactions, A rightarrow D, Delta H = x . Steps involved are A rightarrow B, Delta H_(1) = x_(1) B rightarrow C, Delta H_(2) = ? C rightarrow D, Delta H_(3) = x_(3)

Explain the following (a) it is necessary to control the pH during the reaction of aldehydes or ketons with ammonia derivations . (b ) Benzophene does not react with sodium bisulphite (c ) Acetaldehyde gives aldol condensation while formaldehyde does not . (d ) HCHO reacts with nHCN faster than CH_3 CHO (e ) Aldehydes and ketons undergoes nucleophilic addition reactions .