Amines PYQs Set 9 (PDF)

Set 9 of 10 · Questions 241-270 of 291

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Mere Teacher · Previous Year Questions JEE Main Chemistry · Amines · Set 9 (Q241-270)
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241. $The major product in the above reaction is :$ (1) (2) (3) (4) 242. $In the sequence of following reactions : The starting compound ' P' is$ (1) $m -nitrotoluene$ (2) $p-nitrotoluene$ (3) $o-nitrotoluene$ (4) $o-bromotoluene.$ 243. $Identify the major product formed from the sequence of reactions given below$ (1) (2) (3) (4) 244. $In the above chemical reaction, intermediate " X " and reagent/condition " A " are :$ (1) (2) (3) (4) 245. $The major product of the following chemical reaction is: C H_{3} C H_{2} CN 1) H_{3} O^{+}, ∆ 2) SOC l_{2} 3) Pd / BaSO_{4}, H_{2}$ (1) $(C H_{3} C H_{2} CO)_{2} O$ (2) $C H_{3} C H_{2} CHO$ (3) $C H_{3} C H_{2} C H_{3}$ (4) $C H_{3} C H_{2} C H_{2} OH$ 246. $Major product of the following reaction is$ (1) (2) (3) (4) 247. $Which of the following reaction is correct?$ (1) $C H_{3} C H_{2} C H_{2} N H_{2} H N O_{2}^{\circ} C H_{2} O C H_{3} C H_{2} O H + N_{2} + H C l$ (2) (3) (4) $C_{2} H_{5} C O N H_{2} + B r_{2} + N a O H \to C_{2} H_{5} C H_{2} N H_{2} + N a_{2} C O_{3} + N a B r + H_{2} O$ 248. $Replacement of diazonium group by fluorine is known as$ (1) $Gattermann reaction$ (2) $Sandmeyer reaction$ (3) $Balz-Schiemann reaction$ (4) $Etard reaction.$ 249. $Following transformation can be accomplished by (i) (ii)$ (1) $LiAlH_{4} Pyridinium dichromate$ (2) $Br_{2} /4 KOH NaNO_{2} \cdot HCl$ (3) $Br_{2} /3 KOH Alc. KMnO_{4}$ (4) $NaNO_{2}, HCl LiAlH_{4}$ 250. $In the given reactions sequence, the major product 'C' is C_{8} H_{10} HNO_{3} H_{2} SO_{4} A Br_{2} Δ B alcoholic KOH C$ (1) (2) (3) (4) 251. $The sequence of reagents required to convert aniline to benzene nitrile are$ (1) $NaNO_{2} + HCl, 293 - 298 K; CuCN / KCN$ (2) $NaNO_{2} + HCl, 273 - 278 K; CuCN / KCN$ (3) $NaNO_{2} + HCl, 273 - 298 K; Cu / HCN$ (4) $Cl_{2} / Fe; KCN$ 252. $Identify A, B and C in the sequence:$ (1) $CH_{3} CH_{2} CN, CH_{3} CH_{2} CH_{2} NH_{2}, CH_{3} CH_{2} CH_{2} OH$ (2) $CH_{3} CH_{2} NC, CH_{3} CH_{2} OH CH_{3} CH_{2} CH_{2} NH_{2}$ (3) $CH_{3} CH_{2} CN, C_{2} H_{5} OH, C_{2} H_{3} N_{2} Cl$ (4) $CH_{3} CH_{2} CN, CH_{3} CH_{2} NH_{2}, C_{2} H_{5} OH$ 253. $The correct sequence of reactions to convert p -nitrophenol into quinol involves$ (1) $reduction, diazotization and hydrolysis$ (2) $hydrolysis, diazotization and reduction$ (3) $hydrolysis, reduction and diazotization$ (4) $diazotization, reduction and hydrolysis.$ 254. $Choose the correct colour of the product for the following reaction.$ (1) $Yellow$ (2) $White$ (3) $Red$ (4) $Blue$ 255. $Which one of the following compounds undergoes Hofmann degradation reaction?$ (1) $CH_{3} CN$ (2) $CH_{3} CONHCH_{3}$ (3) $CH_{3} CONH_{2}$ (4) $CH_{3} NC$ 256. $In the following reaction, the suitable starting reagent P is$ (1) (2) (3) (4) 257. $The correct sequential order of the reagents for the given reaction is :$ (1) $H N O_{2}, Fe/ H^{+}, H N O_{2}, KI, H_{2} O/ H^{+}$ (2) $H N O_{2}, KI, Fe/ H^{+}, H N O_{2}, H_{2} O/warm$ (3) $H N O_{2}, KI, H N O_{2}, Fe/ H^{+}, H_{2} O/ H^{+}$ (4) $H N O_{2}, Fe/ H^{+}, KI, H N O_{2}, H_{2} O/warm$ 258. $What is the major product ' R' in the following reaction sequence?$ (1) $o-Nitroaniline$ (2) $m -Nitroaniline$ (3) $p -Nitroaniline$ (4) $p-Aminobenzene sulphonic acid$ 259. $Identify the alkene that is produced in the following series of reactions : Alkene + tert. amine + H_{2} O$ (1) (2) (3) (4) 260. $The reagent P used for the reaction is$ (1) $Zn - Hg / HCl$ (2) $HCl / SnCl_{2}$ (3) $Br_{2} / NaOH$ (4) $ZnCl / HCl$ 261. $Benzene diazonium chloride on reaction with aniline in the presence of dilute hydrochloride acid gives :$ (1) (2) (3) (4) 262. $A. Phenyl methanamine B. N, N-Dimethylaniline C. N-Methyl aniline D. Benzenamine Choose the correct order of basic nature of the above amines.$ (1) $D > C > B > A$ (2) $D > B > C > A$ (3) $A > C > B > D$ (4) $A > B > C > D$ 263. $What are A and B in the following reaction sequence? Propionitrile + A \to B H_{3} O^{+} propiophenone$ (1) (2) $C_{2} H_{5} M g B r C H_{3} C H_{2} C H_{2} - C (= N H) - C_{2} H_{5}$ (3) $C_{6} H_{5} M g B r C H_{3} C H_{2} - C (= N . M g B r) - C_{6} H_{5}$ (4) $C_{6} H_{5} C H_{2} M g B r C H_{3} C H_{2} C H_{2} - C (= N H) - C H_{2} C_{6} H_{5}$ 264. $Primary nitroalkanes are obtained in good yield by oxidising aldoximes with the help of$ (1) $trifluoroperoxyacetic acid$ (2) $acidified potassium permanganate$ (3) $concentrated nitric acid$ (4) $potassium dichromate and dilute sulphuric acid.$ 265. $In the following reactions, which one is NOT correct?$ (1) (2) (3) (4) 266. $In the above conversion of compound (X) to product (Y), the sequence of reagents to be used will be:$ (1) $(i) B r_{2},Fe (ii) Fe, H^{+} (iii) L i A l H_{4}$ (2) $(i) B r_{2} (aq) (ii) LiAlH, (iii) H_{3} O^{+}$ (3) $(i)Fe, H^{+} (ii) B r_{2} (aq) (iii) H N O_{2} (iv) CuBr$ (4) $(i)Fe, H^{+} (ii) B r_{2} (aq) (iii) H N O_{2} (iv) H_{3} P O_{2}$ 267. $The molecular formula of the final product of the following synthetic scheme is$ (1) $C_{9} H_{12} O .$ (2) $C_{10} H_{14} O$ (3) $C_{10} H_{15} N$ (4) $C_{9} H_{10} O$ 268. $X and Y (major products) in the following reaction sequence are$ (1) (2) (3) (4) 269. $The ratio of number of oxygen atoms to bromine atoms in the product Q is_______\times 10^{- 1} .$ 270. $Consider the following sequence of reactions: Molar mass of the product formed (A) is gmol^{- 1} .$