Identify A to E and also explain the reaction involved.

When an oxide of manganese (A) is fused with KOH in the presence of an oxidising agent and dissolved in water, it gives a dark green solution of compound (B). Compound (B) disproportionates in neutral or acidic (C ) oxidises potassium iodide solution to a compound (D) and compound (A) is also formed. Identify compounds A to D and also explain the reactions involved.

When an oxide of manganese (A) is fused with KOH in the presence of an oxidising agent and dissolved in water, it gives a dark green solution of compound (B). Compound (B) disproportionates in neutral or acidic (C ) oxidises potassium iodide solution to a compound (D) and compound (A) is also formed. Identify compounds A to D and also explain the reactions involved.

Identify the polymer and write the reaction involved. 3 - hydroxy butanoic acid and 3-hydroxy pentanoic acid.

Identify the polymer and write the reaction involved. Buta-1,3-diene and styrene in the presence of sodium.

Name the reaction which is commonly used in the conversion of vegetable oil to fats. Explain the reaction involved in detail.