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Physical Properties of Alkenes

Why Benzaldeh...

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Why Benzaldehyde not give red precipitate with fehling solution?

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Q. Which of the following aldehydes give red precipitate with Fehling solution?

Q. Fehling solution gives red precipitate with:

Q. Which of the following does not give brick red precipitate with Fehlings solution?

Q. A compound X has the formula

C_{2} C l_{3} O H

. It gives a red precipitate of

C u_{2} O

with Fehling solution. Then X is :

Q. An organic compound (A) with molecular formula

C_{8} H_{8} O

forms an orange-red precipitate with 2,4 DNP and gives a yellow precipitate of compound (B) on treatment with iodine and sodium hydroxide solution. Compound (A) does not give Tollen's or Fehling test but on drastic oxidation with potassium permanganate, it gives (C) which on reaction with thionyl chloride gives a compound (D) having formula

C_{7} H_{5} O C l

. (D) on reaction with compound (E) having general formula

R_{2} C d

gives back (A)/ Identify (A), (B), (C), (D) and (E). Also, give chemical equations for the reaction involved.

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