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Mdcat-past-papers - UHS - Chemistry Quiz

Filters: Board: UHS | Subject: Chemistry |
321. Which group gives a yellow precipitate of triiodomethane when warmed with alkaline aqueous iodine?



322. It is a general formula of:



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



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



325. 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:



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



327. Which of the following will give a positive test with Tollen's reagent?



328. Tollen's reagent is ammonical silver nitrate solution, which identifies a functional group X with observation O. Identify X and O:



329. The appearance of silver mirror in Tollen's test indicates the presence of which of the following?



330. The blue color of Fehling's solution changes to red when warmed with an aldehyde due to the formation of:



331. Reaction of HCN with formaldehyde is a/an:



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



333. Which compound will be produced by the oxidation of ethanol by acidified K₂Cr₂O₇?



334. Which among the following have least pH?



335. If carboxylic acid and ketone groups C=O are present in a chain then final name will be given as:



336. When carboxylic acids and dicarboxylic acids have similar molecular weights, how do their melting points compare?



337. If carboxylic acid and ketone groups C=O are present in a chain then final name will be given as:



338. Acetic acid is a weak acid than sulphuric acid because of which of the following reasons?



339. Common name of 2-hydroxy propanoic acid is:



340. Which product is formed by the reaction of carboxylic acid with alcohol?



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