An organic compound `(A)` composed of `C, H,` and `O` gives a characteristic colour with ceric ammonium nitrate. Treatement of `(A)` with `PCl_5` gives `(B)` which reacts with `KCN` to form `( C)`. The reductionof `( C)` with warm `Na//C_2 H_5 OH` produces `(D)` which on heating gives `(E)` with the evolution of ammonia. Pyridine is obtained on treatment of `(E)` with nitrobenzene.

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 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 organic compound (A) C_(5)H_(9) Br which readily decolourises bromine water and KMnO_(4) solution gives (B), C_(5)H_(11)Br on treatment with Sn//HCI . The reaction of (A) with NaNH_(2) produces (C) with evolution of ammonia (C) neither reacts with sodium nor forms any metal acetylide but reacts with Lindlar catalyst to give (D) and on reaction with Na//liq . NH_(3) produces (E) .Both the compounds (D) and (E) are isomeric. Give structures of (A) to (E) with proper reasoning.

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 coompound E. Alkaline hydrolysis of E gives a salt F which on heating with soda lime produces n-butane. Careful oxidation of A with dichromate gives acetic acid and malonic acid. Give the structures from A to F with proper reason.

An aromatic compound (A), C_(7)H_(5)NO_(2)CI_(2) on reduction with Sn//HCI gives (G), which on reaction with NaNO_(2)//HCI gives (B). Compound (B) does not form a dye with beta -naphthol. However, (B) gives red colour with ceric ammonium nitrate and on oxidation gives an acid (D) of equivalent weight 191. Decarboxylation of (D) gives (E), which forms a mono nitro derivative (F) on nitrotion. Give the structures of (A) to (F) with proper reasoning.

The compound A on treatment with Na gives B , and with PCl_(5) gives C . B and C react together to give di Ethyl ether. A,B and C are in the order

The compound A on treatment with Na gives B, and with PCl_(5) gives C. B and C react together to give diethyl ether. A, B and C are in the order-