Arrange the following in increasing order of acidity and name the property which decides this order :

(i) HCOOH ,CH₃ COOH, CH₂Cl COOH.

(ii) CH₃COOH, CH₃OH, C₆H₅OH.

Write balanced equations for the following reactions :

(i) Tin with aqueous sodium hydroxide.

(ii) Copper with dilute nitric acid.

(iii) Bromine with sodium sulphite.

(iv) Preparation of bleaching powder.

Write the equation and name the following reactions :

(i) Acetic acid with red phosphorus and chlorine.

(ii) Acetaldehyde with aluminium ethoxide.

(iii) Phenol with acetyl chloride in the presence of AlCl₃.

(iv) Benzaldehyde with concentrated sodium hydroxide.

28. An organic compound A on treatment with ethyl alcohol gives a carboxylic acid B and a compound C. Hydrolysis of C under acidic conditions gives B and D. Oxidation of D with KMnO₄ gives B. B on heating with Ca(OH)₂ gives E with molecular formula C₃H_sO. E reacts with 2, 4 dinitrophenyl hydrazine but does not answer Tollen’s test or react with Fehlings solution. Identify A,B, C,D and E.

How will you convert the following (write the relevant equations) :

Acetic anhydride to methyl amine.

How will you convert the following (write the relevant equations) :
Phenol to salicylic acid.