General Organic Chemistry PYQs Set 9 (PDF)

Set 9 of 22 · Questions 241-270 of 650

In the print window choose “Save as PDF”. The file prints without a web address or date line.

Mere Teacher · Previous Year Questions NEET Chemistry · General Organic Chemistry · Set 9 (Q241-270)
Scan or visit mereteacher.com for free PYQ practice, timed CBT tests, step-by-step solutions and BroBot AI. Answers and solutions are free with a sign-up.
241. $Appearance of blood red colour, on treatment of the sodium fusion extract of an organic compound with FeSO_{4} in presence of concentrated H_{2} SO_{4} indicates the presence of element/s$ (1) $Br$ (2) $N$ (3) $N and S$ (4) $S$ 242. $Which one of the following nitro-compounds does not react with nitrous acid$ (1) (2) (3) (4) 243. $Which of the following molecules is expected to rotate the plane of polarized light?$ (1) (2) (3) (4) 244. $Number of stereo centers present in linear and cyclic structures of glucose are respectively :$ (1) $5 & 4$ (2) $4 & 4$ (3) $5 & 5$ (4) $4 & 5$ 245. $Which of the following statements are correct? (i) Inductive effect and resonance effect is possible in chlorobenzene. (ii) Resonance effect dominates over inductive effect in anisole. (iii) p -nitrobenzoic acid is less acidic than m -nitrobenzoic acid. (iv) Diphenylamine is more basic than aniline.$ (1) $(i), (ii), (iii) and (iv)$ (2) $(i) and (ii)$ (3) $(iii) and (iv)$ (4) $(i) and (iii)$ 246. $The correct match between Item I and Item II is: Item I (compound) Item II (reagent) (A) Lysine (P) l-Naphthol (B) Furfural (Q) Ninhydrin (C) Benzyl alcohol (R) KMnO_{4} (D) Styrene (S) Ceric ammonium nitrate$ (1) $(A) \to (Q); (B) \to (P); (C) \to (S); (D) \to (R)$ (2) $(A) \to (Q); (B) \to (P); (C) \to (R); (D) \to (S)$ (3) $(A) \to (R); (B) \to (P); (C) \to (Q); (D) \to (S)$ (4) $(A) \to (Q); (B) \to (R); (C) \to (S); (D) \to (P)$ 247. $In the following compound, the favourable site/s for protonation is/are :$ (1) $(a) and (e)$ (2) $(b), (c) and (d)$ (3) $(a) and (d)$ (4) $(a)$ 248. $1Consider the following compound (X) The most stable and least stable carbon radicals, respectively, produced by homolytic cleavage of corresponding C - H bond are:$ (1) $I II, I I$ (2) $II, I V$ (3) $I, IV$ (4) $II, I$ 249. $Which of the following acids does not exhibit optical isomerism ?$ (1) $Maleic acid$ (2) $α-amino acids$ (3) $Lactic acid$ (4) $Tartaric acid$ 250. $Among the following, the least stable resonating structure is :$ (1) (2) (3) (4) 251. $In which of the following molecules, all atoms are coplanar ?$ (1) (2) (3) (4) 252. $Phenol on reaction with dilute nitric acid, gives two products. Which method will be most effective for large scale separation ?$ (1) $Chromatographic separation$ (2) $Fractional Crystallisation$ (3) $Steam distillation$ (4) $Sublimation$ 253. $Which of the following, upon treatment with tert-BuONa followed by addition of bromine water, fails to decolourize the colour of bromine ?$ (1) (2) (3) (4) 254. $The amine that reacts with Hinsberg's reagent to give an alkali insoluble product is -$ (1) $C H_{3} - C H_{3} C H - N H - C H_{3} C H - C H_{3}$ (2) $C H_{3} - C H_{2} - N C H_{2} C H_{3} - C H_{2} C H_{3}$ (3) $C H_{3} - C H_{3} C N H_{2} - C H_{2} C H_{2} C H_{3}$ (4) $C H_{3} - C H_{3} C C H_{3} - C H_{3} C H - N H_{2}$ 255. $An organic compound X(molecular formula C_{6} H_{7} O_{2} N) has six carbon atoms in a ring system, two double bonds and a nitro group as substituent, X is$ (1) $homocyclic but not aromatic$ (2) $aromatic but not homocyclic$ (3) $homocyclic and aromatic$ (4) $heterocyclic and aromatic.$ 256. $The compound A on treatment with Na gives B, and with P C l_{5} gives C, B and C react together to give diethyl ether. A, B and C are in the order$ (1) $C_{2} H_{5} OH, C_{2} H_{6}, C_{2} H_{5} Cl$ (2) $C_{2} H_{5} OH, C_{2} H_{5} ONa, C_{2} H_{5} Cl$ (3) $C_{2} H_{5} Cl, C_{2} H_{6}, C_{2} H_{5} OH$ (4) $C_{2} H_{5} OH, C_{2} H_{5} Cl, C_{2} H_{5} ONa$ 257. $In Dumas’ method of estimation of nitrogen 0.35 g of an organic compound gave 55 m L of nitrogen collected at 300 K temperature and 715 mm pressure. The percentage composition of nitrogen in the compound would be (aqueous tension at 300 K = 15 mm).$ (1) $15.45$ (2) $16.45$ (3) $17.45$ (4) $14.45$ 258. $Which of the following compound does not exhibit geometrical Isomerism?$ (1) $2-Butene$ (2) $3-Hexene$ (3) $But-2-enal$ (4) $Styrene$ 259. $The major organic product in the reaction, CH3OCH(CH3)2 + HI \toProduct, is/are$ (1) $CH3OH + (CH3)2CHI$ (2) $ICH2OCH(CH3)2$ (3) $C H_{3} O I C (C H_{3})_{2}$ (4) $CH3Ι + (CH3)2CHOH$ 260. $The increasing order of the pK_{b} of the following compounds is :$ (1) $(A) < (C) < (D) < (B)$ (2) $(C) < (A) < (D) < (B)$ (3) $(B) < (D) < (A) < (C)$ (4) $(B) < (D) < (C) < (A)$ 261. $Identify the molecules which have sp-hybridized carbon(s) from the list given under. I. Ethane nitrile, II. Buta-1, 3 - diene, III. Propa-1, 2-diene, IV. Ethyne V. Benzene$ (1) $I, II, III only$ (2) $II, III, IV only$ (3) $III, IV, V only$ (4) $I, III, IV only$ 262. $In Carius method of estimation of halogen, 0.172 g of an organic compound showed presence of 0.08 g of bromine. Which of these is the correct structure of the compound?$ (1) (2) (3) $H_{3} C - Br$ (4) $H_{3} C - CH_{2} - Br$ 263. $The correct IUPAC name of the given structure is$ (1) $4-Amino-5-(2, 2-Dimethylpropyl) non-5-en-7-ol$ (2) $6-Amino-3-hydroxy-5-(2,2-Dimethylpropyl) non-4-ene$ (3) $7-Hydroxy-5-(2,2-Dimethylpropyl) non-5-en-4 amine$ (4) $6-Amino-5-(2, 2-Dimethylpropyl) non-4-n-3-ol$ 264. $The number of structural isomers possible from the molecular formula C3H9N is :$ (1) $4$ (2) $5$ (3) $2$ (4) $3$ 265. $Which among the given molecules can exhibit tautomerism?$ (1) $III only$ (2) $Both I and III$ (3) $Both I and II$ (4) $Both II and III$ 266. $The increasing order of the p K_{a} values of the following compounds is:$ (1) $C < B < A < D$ (2) $B < C < D < A$ (3) $D < A < C < B$ (4) $B < C < A < D$ 267. $Arrange the following in increasing order of stability$ (1) $5 < 4 < 3 < 1 < 2$ (2) $4 < 5 < 3 < 1 < 2$ (3) $1 < 5 < 4 < 3 < 2$ (4) $5 < 4 < 3 < 2 < 1$ 268. $The major product for the following reaction is :$ (1) (2) (3) (4) 269. $Choose the correct statement regarding the formation of carbocations A and B given :-$ (1) $Carbocation B is more stable and formed relatively at faster rate$ (2) $Carbocation A is more stable and formed relatively at slow rate$ (3) $Carbocation B is more stable and formed relatively at slow rate$ (4) $Carbocation A is more stable and formed relatively at faster rate$ 270. $In the following carbocation; H/ C H_{3} that is most likely to migrate to the positively charged carbon is$ (1) $C H_{3} at C-4$ (2) $H at C-4$ (3) $C H_{3} at C-2$ (4) $H at C-2$