Amines PYQs Set 9 (PDF)

Set 9 of 10 · Questions 241-270 of 273

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Mere Teacher · Previous Year Questions NEET Chemistry · Amines · Set 9 (Q241-270)
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241. $The correct sequential order of the reagents for the given reaction is :$ (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) $H N O_{2}, Fe/ H^{+}, KI, H N O_{2}, H_{2} O/warm$ 242. $What is the major product ' R' in the following reaction sequence?$ (1) $o-Nitroaniline$ (2) $m -Nitroaniline$ (3) $p -Nitroaniline$ (4) $p-Aminobenzene sulphonic acid$ 243. $Identify the alkene that is produced in the following series of reactions : Alkene + tert. amine + H_{2} O$ (1) (2) (3) (4) 244. $The reagent P used for the reaction is$ (1) $Zn - Hg / HCl$ (2) $HCl / SnCl_{2}$ (3) $Br_{2} / NaOH$ (4) $ZnCl / HCl$ 245. $Benzene diazonium chloride on reaction with aniline in the presence of dilute hydrochloride acid gives :$ (1) (2) (3) (4) 246. $A. Phenyl methanamine B. N, N-Dimethylaniline C. N-Methyl aniline D. Benzenamine Choose the correct order of basic nature of the above amines.$ (1) $D > C > B > A$ (2) $D > B > C > A$ (3) $A > C > B > D$ (4) $A > B > C > D$ 247. $What are A and B in the following reaction sequence? Propionitrile + A \to B H_{3} O^{+} propiophenone$ (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) $C_{6} H_{5} C H_{2} M g B r C H_{3} C H_{2} C H_{2} - C (= N H) - C H_{2} C_{6} H_{5}$ 248. $Primary nitroalkanes are obtained in good yield by oxidising aldoximes with the help of$ (1) $trifluoroperoxyacetic acid$ (2) $acidified potassium permanganate$ (3) $concentrated nitric acid$ (4) $potassium dichromate and dilute sulphuric acid.$ 249. $In the following reactions, which one is NOT correct?$ (1) (2) (3) (4) 250. $In the above conversion of compound (X) to product (Y), the sequence of reagents to be used will be:$ (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) $(i)Fe, H^{+} (ii) B r_{2} (aq) (iii) H N O_{2} (iv) H_{3} P O_{2}$ 251. $The molecular formula of the final product of the following synthetic scheme is$ (1) $C_{9} H_{12} O .$ (2) $C_{10} H_{14} O$ (3) $C_{10} H_{15} N$ (4) $C_{9} H_{10} O$ 252. $X and Y (major products) in the following reaction sequence are$ (1) (2) (3) (4) 253. $In the following sequence of reactions; A Reduction B HNO_{2} CH_{3} CH_{2} OH The compound A is$ (1) $propane nitrile$ (2) $ethane nitrile$ (3) $nitromethane$ (4) $methyl isocyanate.$ 254. $Hinsberg's reagent is$ (1) $C_{6} H_{5} SO_{2} Cl$ (2) $C_{6} H_{5} SO_{2} NH_{2}$ (3) $CH_{3} COCl / pyridine$ (4) $(CH_{3} CO)_{2} O / pyridine$ 255. $A secondary amine is$ (1) $compound with an NH_{2} group on the carbon atom in number 2 position$ (2) $a compound in which 2 of the hydrogen of NH_{3} have been replaced by organic groups$ (3) $an organic compound with two NH_{2} groups$ (4) $a compound with two carbon atoms and an NH_{2} group$ 256. $What are X and Y in the following reactions? (X) (Y)$ (1) $CH_{3} CH_{2} OH H_{3} PO_{2}, H_{2} O$ (2) $CH_{3} MgX H_{3} PO_{3}$ (3) $Aliphatic diazonium salts liberate nitrogen gas quantitatively.$ (4) $Aniline cannot be converted into fluorobenzene via its diazonium salt$ 257. $In the given set of reactions: 2-Bromopropane \to alc . AgCN heat X \to LiAlH_{4} Y The IUPAC name of product Y is$ (1) $N -isopropylmethanamine$ (2) $N-methylpropan-2-amine$ (3) $N -methylpropanamine$ (4) $butan-2-amine.$ 258. $Following is a confirmatory test for aromatic primary amines. Identify reagent (A) and (B). C_{6} H_{5} N H_{2} (A) C_{6} H_{5} N_{2}^{+} C l^{-} (B) NaOH Scarlet red dye$ (1) $A = HN O_{3} / H_{2} S O_{4}; B = phenol$ (2) $A = NaN O_{2} + HCl, 0 - 5^{\circ} C; B = aniline$ (3) $A = NaN O_{2} + HCl, 0 - 5^{\circ} C; B = 1-naphthol (α -naphthol)$ (4) $A = NaN O_{2} + HCl, 0 - 5^{\circ} C; B = 2-naphthol (β -naphthol)$ 259. $What is the IUPAC name of the below given compound?$ (1) $N - Methyl-N-ethylbenzenamine$ (2) $N - Methyl - N - phenylethanamine$ (3) $N -Ethyl- N - Methylbenzenamine$ (4) $N -Ethyl- N - phenylmethanamine$ 260. $R - CN (i) SnCl_{2} + HCl (ii) H_{3} O^{+} R - CHO What is the name of the above reaction?$ (1) $Rosenmund$ (2) $Williamson$ (3) $Stephen$ (4) $Kolbe$ 261. $Given below are two statements : Statement I: Aniline reacts with con. H_{2} SO_{4} followed by heating at 453 - 473 K gives p- aminobenzene sulphonic acid, which gives blood red colour in the 'Lassaigne's test'. Statement II: In Friedel - Craft's alkylation and acylation reactions, aniline forms salt with the AlCl_{3} catalyst. Due to this, nitrogen of aniline aquires a positive charge and acts as deactivating group. In the light of the above statements, choose the correct answer from the options given below :$ (1) $Statement I is false but statement II is true$ (2) $Both statement I and statement II are false$ (3) $Statement I is true but statement II is false$ (4) $Both statement I and statement II are true$ 262. $A student performed analysis of aliphatic organic compound ' X' which on analysis gave C = 61.01 %, H = 15.25 %, N = 23.74 % . This compound, on treatment with HNO_{2} / H_{2} O produced another compound ' Y ' which did not contain any nitrogen atom. However, the compound ' Y' upon controlled oxidation produced another compound ' Z' that responded to iodoform test. The structure of ' X' is :$ (1) $C H_{3} - C H_{2} - C H (N H_{2}) - C H_{3}$ (2) $(C H_{3})_{2} C H - N H_{2}$ (3) $CH_{3} CH_{2} CH_{2} NH_{2}$ (4) $P h - C H (C H_{3}) - N H_{2}$ 263. $In the given reaction what is X?$ (1) $Isonitrile$ (2) $Nitrile$ (3) $Nitrite$ (4) $Oxime$ 264. $The final product R is$ (1) (2) (3) (4) 265. $The structure of X is:$ (1) (2) (3) (4) 266. $C_{2} H_{5} Br excess NH_{3} A Br_{2} KOH B What is B in the given reaction?$ (1) (2) (3) (4) 267. $An organic compound 'A' contains nitrogen and chlorine. It dissolves readily in water to give a solution that turns litmus red. Titration of compound 'A' with standard base indicates that the molecular weight of ' A^{5} is 131 \pm 2. When a sample of^{£} A' is treated with aq. NaOH, a liquid separates which contains N but not Cl. Treatment of the obtained liquid with nitrous acid followed by phenol gives orange precipitate. The compound 'A' is :$ (1) (2) (3) (4) 268. $What is IUPAC name of allylamine?$ (1) $Propan-1-amine$ (2) $Prop-2-en-1-amine$ (3) $Prop-1-en-2amine$ (4) $Propan-2-amine$ 269. $Indentify X in the following.$ (1) (2) (3) (4) 270. $CH_{3} -CH_{2} -CN CH_{3} MgBr Ether A H_{3} O^{+} B Zn-Hg HCl C The correct structure of C is$ (1) $C H_{3} - C H_{2} - C H_{2} - C H_{3}$ (2) $C H_{3} - C H_{2} - C (= O) - C H_{3}$ (3) $C H_{3} - C H_{2} - C H (O H) - C H_{3}$ (4) $C H_{3} — C H_{2} —CH = C H_{2}$