In the given transformation, which of the following is the most appropriate reagent?
Trichloroacetaldehyde was subjected to Cannizaro reaction by using NaOH. The mixture of the products contain sodium trichloroacetate ion and another compound. The other compound is
Cannizaro reaction is given by aldehydes (RCHO) lacking H at a-carbon or lacking α-carbon (as in HCHO). With NaOH, there is formation of acid salt (RCOO-) by oxidation and alcohol (RCH2OH) by reduction.
Silver mirror test is given by which one of the following compounds ?
All aldehydes including reducing sugar (as glucose, fructose) give silver mirror test (with Tollen's reagent).
Thus, acetaldehyde and formaldehyde give silver mirror test.
Which of the following on heating with aqueous KOH, produces acetaldehyde?
The increasing order of the rate of HCN addition to compounds A-D is
Addition of HCN is a nucleophilic reaction, Greater the electron deficiency of C atom of carbonyl group, higher the rate of reaction. Hence,
The best reagent to convert pent-3-en-2-ol into pent-3-en-2-one is
Only suitable reagent is chromic anhydride in glacial acetic acid. Other will also affect bond.
On vigorous oxidation by permanganate solution,
bond is cleaved and oxidised to — COOH,—CHO group is also oxidised to —COOH.