Compound (A) with molecular formula C₂H₄O reduces Tollen's reagent. (A) On treatment with HCN gives compound (B). Compound (B) on hydrolysis with an acid gives compound (C) with molecular formula C₃H₆O₃ which is an optically active compound. Compound (A) on reduction with N₂H/C₂H_sONa gives a hydrocarbon (D) of molecular formula C₂H₆. Identify (A), (B), (C) and (D) and explain the reactions.

An organic compound (A) of molecular formula C₇H₆O is called as oil of bitter almonds. (A) on oxidation gives (B) of molecular formula C₇H₆O₂ which gives brisk effervescence with NaHCO₃ solution. When (A) is refluxed with aqueous alcoholic (KCN) compound (C) is formed. Identify A, B and C and write the equations.

Ail organic compound. (A) C₇H₆O reduces Tollens reagent. Compound (A) reacts with acetic anhydride in the presence of anhydrous sodium acetate and gives an unsaturated acid (B). Compound (A) reacts with acetone in the presence of alkali and gives (C). What are (A)(B) and (C) Explain the reactions.

An organic compound Aofmolecular formula C₃H₆O answers iodoform test. Another organic compound B of molecular formula C₇H₆O is known as oil of bitter almonds. A reacts with B to form an unsaturated compound C of molecular formula C₁₀H₁₀O. Compound B reacts with malonic acid in the presence of pyridine to form an unsaturated acid D of molecular formula C₉H₅O₂ Identify A, B, C and D. Explain the reactions.

Compound (A) with Molecular formula C₇H₆O does not reduce Fehling's solution. Compound (A) reacts with acetone in the presence of NaOH to give a compound (B) which is an α, β-unsaturated compound. Further (A) reacts with dimethyl aniline in the presence of cone, H₂SO₄ to give compound (C) which is a dye. Identify (A) (B) and (C). Explain the reactions.