Fehlings solution and Benedict's is only for Aliphatic aldehydes, whereas benzaldehyde is an aromatic one. Hence no reaction.
(i) PhMgBr and then H3O+ (ii) Tollens reagent
(iii) Semicarbazide and weak acid (iv) Excess ethanol and acid
(v) Zinc amalgam and dilute hydrochloric acid
Add a solution of 1 or 2 drops or 30 mg of unknown in 2 mL of 95% ethanol to 3 mL of 2,4-dinitrophenylhydrazine reagent. Shake vigorously, and, if no precipitate forms immediately, allow the solution to stand for 15 minutes.
The 2,4-dinitrophenylhydrazine reagent will already be prepared for you.
An organic compound A (C8H10O) neither gives tollen's test nor gives iodoform test. (A) on treatment with HBr with An yields hydrocarbon (D) which burns with sooty flame. Compound (C) forms analkene on treatment with alcohol KOH . Identify A,B,C,D and write reaction involved.
Azo-dye test is used to distinguish the difference between the Ethylamine and aniline from each other. When the aniline gets treated with the Nitrous acid at 0-5°C, it forms a dye. ... Due to the evolution of the nitrogen gas during the reaction, ethylamine will give a brisk effervescence.
c is the right answer it may help you
Aromatic aldehydes and ketones does not respond to Fehling's test.
Sodium hydrogen sulphite,phenyl hydrazine, grignard reaction are common for carbonyl groups
Benzaldehyde and acetone does not react with Fehling's solution.
I think it's C. Benedict's reagent .
Hope it helps u
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write the answer of substantiate fluoride has the lowest solubility among group one metal fluorides