21.$R-NC$ $\underrightarrow{LiAlH_{4}}$ P The product P in this reaction is A) $R-NH_{2}$ B) $R-NH-CH_{3}$ C) $R-CH_{3}$ D) $R-N-(CH_{3})_{2}$ View Answer Report DiscussAnswer: Option BExplanation: Isonitriles on reductiobn with Li AlH4 give 2° amines $R-N\overrightarrow{=}C$ $\underrightarrow{LiAlH_{4}}$ RNHCH3
22. Acetophenone and benzophenone can be distinguished by which of the following test A) Knoeveangel reaction B) Canizzaro's reaction C) Aldol Condensation D) HVZ reaction View Answer Report DiscussAnswer: Option CExplanation:Aldehydes and Ketones containing $\alpha$ - hydrogen undergo aldol condensation. Since benzophenone does not have $\alpha$- hydrogen hence do not undergo aldol condensation whereas acetophenone show this reaction due to the presence of $\alpha$- H atom
23.Which one of the following show stereoisomerism ? A) 2-Butene B) 3-Methyl but-1-ene C) 2-Methyl butene D) Butanol View Answer Report DiscussAnswer: Option AExplanation:
24. By which reaction ketal is formed ? A) Glycol and Acetone B) Hydration of glycol C) Condensation of glycol D) Glycol with acetaldehyde View Answer Report DiscussAnswer: Option AExplanation:
25. Which of the two acids form anhydrides? (I) Oxalic acid (II) Succinic acid (III) Benzoic acid (IV) Phthalic acid A) I and II B) II and IV C) II and III D) III and IV View Answer Report DiscussAnswer: Option BExplanation:
