An organic compound `P(C_2 H_4 O) `reduces Tollen's reagent. On oxidation of P with acidified `K_2 Cr_2 O_7`, the compound A is formed which on treatment with calcium hydroxide forms a compound B. Dry distillation of B produces C which on warming with dilute NaOH gives D. Heating D with an acid produces E. What are A, B, C, D and E and give the reaction sequences.

An element A reacts with water to form a compound B which is used in white washing. The compound B on heating forms an oxide C which on treatment with water gives back B. Identify A, B and C and give the reactions involved.

(A) C_(2)H_(12)O (ether) on treatment with PCl_(5) forms alkyl chlorides (B) and (C ) . (B) and (C ) both on treatment with aq. NaOH give alcohol (D) and (E ), both (D) and (E ) give iodoform test. What are (A),(B),(C ), (D) and (E ) ?

An organic compound (A) (C_5 H_8 O_3) on heating with soda lime gives (B) which reacts with HCN to give ( C) . The compound ( C) reacts with thionyl chloride to produce (D) which on reaction with KCN gives a compound ( E) . Alkaline hydrolysis of ( E) gives a salt (F) which on heating with soda lime produces n-butane . Careful oxidation of (A) with dichromate give acetic acid and malonic acid. Give the structures to (A) to (F) with proper reasoning.

An alcohol (A) C_4H_(10)O on oxidation with acidified K_2Cr_2O_7 gives a carboxylic acid (B) C_4H_8O_2 . (A) on treatment with conc. H_2SO_4 produces (C) C_4H_8 . (C) on treatment with dil. H_2SO_4 gives (D) C_4H_(10)O . The compound (D) is isomeric with compound (A). Compound (D) resist oxidation . What are (A) and (D) respectively ?

An organic compound (A) C_8 H_4 O_3 , in dry bebzene in the presence of anhydrous AlCl_3 gives compound (B ). The compound (B) on treatment with PCl_5 followed by reaction with H_2 //Pd (BaSo_4) gives compound (C ) which on reaction with hydrazine gives a cyclide compound (D) (C_(14) H_(10) N_2) . Identify (A), (B) (C ), and (D) Explain the formation of (D ) from (C ).