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4241. Consider the following reaction: R–CHO + 2[Ag(NH₃)₂]OH → R–COOH + 2Ag + H₂O + 2NH₃



4242. A student mixed ethyl alcohol with small amount of sodium dichromate and added it to the hot solution of dilute sulphuric acid. A vigorous reaction took place. He distilled the product:



4243. Which of the following is also called silver mirror test?



4244. Which one of the following test is given by both aldehyde and ketone?



4245. Propanone can be prepared from propyne by:



4246. Aldehydes react with:



4247. Addition product of formaldehyde & ethyl alcohol is:



4248. Catalytic reduction of aldehyde and ketone forms:



4249. The function of NaOH in Aldol condensation & Cannizzaro's reaction respectively is:



4250. Cannizzaro's reaction is given by:



4251. Acetone reacts with hydrogen cyanide (HCN) to form a cyanohydrin. It is an example of:



4252. In presence of which of the following, Wolff-Kishner reduction of aldehydes is carried out?



4253. Addition of HCN to carbonyl compounds causes the change in hybridization from --- to ---



4254. In the below reaction, the nucleophile is: HCHO + HCN → OH–CH₂–CN



4255. Which group gives a yellow precipitate of triiodomethane when warmed with alkaline aqueous iodine?



4256. It is a general formula of:



4257. Which one of the following reagents is used to distinguish between aldehydes and ketones?



4258. Which type of reaction takes place when a carbonyl compound is taken with a mixture of NaCN and an acid?



4259. Aqueous solutions of Iodine and sodium hydroxide were mixed in a round bottom flask at 70°C. Following chemical reaction: 3I₂ + 6NaOH → NaIO₃ + NaI + H₂O This reaction is termed as:



4260. Which of the following alcohol can give iodoform reaction?



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