Alcohols, Phenols & Ethers PYQs Set 13 (PDF)

Set 13 of 14 · Questions 361-390 of 406

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Mere Teacher · Previous Year Questions JEE Main Chemistry · Alcohols, Phenols & Ethers · Set 13 (Q361-390)
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361. $Identify the major products and respectively in the following reaction of phenol :$ (1) (2) (3) (4) 362. $Phenol \to X forms a tribromo derivative. " X " is$ (1) $bromine in benzene$ (2) $bromine in water$ (3) $potassium bromide solution$ (4) $bromine in carbon tetrachloride at 0^{\circ} C .$ 363. $Match List - I with List - II. List-I (Reactants) (A) Phenol, Zn /Δ (B) Phenol, CHCl_{3}, NaOH, HCl (C) Phenol, CO_{2}, NaOH, HCl (D) Phenol, Conc. HNO_{3} List-II Products (I) Salicylaldehyde (II) Salicylic acid (III) Benzene (IV) Picric acid Choose the correct answer from the options given below.$ (1) $(A)-(IV), (B), (II), (C)-(I), (D)-(III)$ (2) $(A)-(IV), (B)-(I), (C)-(II), (D)-(III)$ (3) $(A)-(III), (B)-(I), (C)-(II), (D)-(IV)$ (4) $(A)-(III), (B)-(IV), (C)-(I), (D)-(II)$ 364. $An organic compound ' X' on treatment with PCC in dichloromethane gives the compound Y . Compound ' Y' reacts with I_{2} and alkali to form yellow precipitate of triiodomethane. The compound X is$ (1) $CH_{3} CHO$ (2) $CH_{3} CH_{2} OH$ (3) $CH_{3} COCH_{3}$ (4) $CH_{3} COOH$ 365. $Which one the following compounds will readily react with dilute NaOH ?$ (1) $C_{2} H_{5} OH$ (2) $C_{6} H_{5} OH$ (3) $C_{6} H_{5} CH_{2} OH$ (4) $(CH_{3})_{3} COH$ 366. $Benzene carbaldehyde is reacted with concentrated NaOH solution to give the products A and B . The product A can be used as food preservative and the product B is an aromatic hydroxy compound where OH group is linked to s p^{3} hybridised carbon atom next to benzene ring. The products A and B are respectively,$ (1) $sodium benzoate and phenol$ (2) $sodium benzoate and phenyl methanol$ (3) $sodium benzoate and cresol$ (4) $sodium benzoate and picric acid.$ 367. $When glycerol is treated with excess of HI, it produces$ (1) $2‐iodopropane$ (2) $allyl iodide$ (3) $propene$ (4) $glycerol triiodide$ 368. $In the cumene to phenol preparation in presence of air, the intermediate is$ (1) (2) (3) (4) 369. $What are X and Y in the following reactions? CH_{2} O (i) X (ii) H_{3} O^{+} CH_{3} (CH_{2})_{2} CH_{2} OH Y (i) C_{2} H_{5} MgBr (ii) H_{3} O^{+} CH_{3} CH_{2} C (CH_{3})_{2} OH$ (1) $C H_{3} - C H (C H_{3}) - M g B r X C_{2} H_{5} C O C H_{3} Y$ (2) $CH_{3} CH_{2} CH_{2} MgBr CH_{3} - CO - CH_{3}$ (3) $CH_{3} - CH_{2} - MgBr CH_{3} CH_{2} CHO$ (4) $(CH_{3})_{3} CMgBr CH_{3} - CO - CH_{3}$ 370. $The product formed in the given reaction is$ (1) (2) (3) (4) 371. $Identify the products [A] and [B], respectively in the following reaction:$ (1) (2) (3) (4) 372. $tert-butyl methyl ether on treatment with hydrogen iodide in cold gives$ (1) $tert-butyl iodide and methyl iodide$ (2) $tert-butyl alcohol and methyl alcohol$ (3) $tert-butyl alcohol and methyl iodide$ (4) $tert-butyl iodide and methyl alcohol$ 373. $In Kolbe's reaction the reacting substances are$ (1) $sodium phenate and CCl_{4}$ (2) $phenol and CHCl_{3}$ (3) $sodium phenate and CO_{2}$ (4) $phenol and CCl_{4} .$ 374. $What are ' X' and ' Y' respectively in the following reactions?$ (1) (2) (3) (4) 375. $Phenol treated with chloroform in presence of sodium hydroxide, which further hydrolysed in presence of an acid results$ (1) $Salicyclic acid$ (2) $Benzene-1,2-diol$ (3) $Benzene-1, 3-diol$ (4) $2-Hydroxybenzaldehyde$ 376. $Benzene is treated with oleum to produce compound (X) which when further heated with molten sodium hydroxide followed by acidification produces compound (Y) . The compound Y is treated with zinc metal to produce compound (Z) . Identify the structure of compound (Z) from the following option.$ (1) (2) (3) (4) 377. $Which is the final product (major) 'A' in the given reaction? HCl ‘A’ (Major Product)$ (1) (2) (3) (4) 378. $Which among the following is obtained as a product when phenol is treated with NaOH and CO_{2} followed by acid hydrolysis?$ (1) $Salicylaldehyde$ (2) $Salicylic acid$ (3) $Phthalic acid$ (4) $Benzoic acid$ 379. $Consider the above reaction sequence, the Product 'C is$ (1) (2) (3) (4) 380. $Which of the following derivatives of alcohols is unstable in an aqueous base?$ (1) (2) $RO - CMe_{3}$ (3) (4) 381. $When neopentyl alcohol is heated with an acid, it slowly converted into an 85 : 15 mixture of alkenes A and B, respectively. What are these alkenes?$ (1) (2) (3) (4) 382. $Consider the given reaction, identify the major product P . CH_{3} - COOH (i) LiAlH_{4} (ii) PCC (iii) HCN / O H (iv) H_{2} O / O H, Δ "P"$ (1) $C H_{3} - C H_{2} - C (= O) - N H_{2}$ (2) $C H_{3} - C H_{2} - C H_{2} - O H$ (3) $C H_{3} - C (O H) - C H_{2} C H_{3}$ (4) $C H_{3} - C (= O) - N H_{2}$ 383. $The steps involved in the conversion of propan-2-ol to propan-1-ol are in the order$ (1) $heating with PCl_{5}, heating with alc. KOH, acid catalysed addition of water$ (2) $heating with PCl_{5}, heating with alc. KOH, hydroboration oxidation$ (3) $dehydration, addition of HBr in presence of peroxide, heating with alc. KOH$ (4) $dehydration, addition of HBr, heating with aq. KOH$ 384. $Consider the following reaction and identify the product (P) . [NEET 2023]$ (1) $CH_{3} CH = CH - CH_{3}$ (2) $C H_{3} - C H (C H_{3}) - C H (B r) - C H_{3}$ (3) $C H_{3} - C (C H_{3})_{2} - C H_{2} B r$ (4) $C H_{3} - C (B r) (C H_{3}) - C H_{2} - C H_{3}$ 385. $Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Synthesis of ethyl phenyl ether may be achieved by Williamson synthesis. Reason (R): Reaction of bromobenzene with sodium ethoxide yields ethyl phenyl ether. choose the most appropriate answer from the options given below:$ (1) $Both (A) and (R) are correct and (R) is the correct explanation of (A)$ (2) $(A) is correct but (R) is not correct$ (3) $(A) is not correct but (R) is correct$ (4) $Both (R) and (R) are correct but (R) is NOT the correct explanation of (A)$ 386. $Lucas reagent is$ (1) $conc. H C l and anhydrous Z n C l_{2}$ (2) $conc. H N O_{3} and hydrous Z n C l_{2}$ (3) $conc. H C l and hydrous Z n C l_{2}$ (4) $conc. H N O_{3} and anhydrous Z n C l_{2} .$ 387. $Consider the following reaction sequence Compound (x) (76.6 % C, 6.38 % H, Vapour density 47) (i) CO_{2}, NaOH, 120^{\circ} C, high pressure (ii) H_{3} O^{+} Compound (y) (Major Product) Compound (y) develops characteristic colour with neutral FeCl_{3} solution. Identify the INCORRECT statement from the following for the above sequence.$ (1) $Compound y will dissolve in NaHCO_{3} and evolve a gas.$ (2) $Both compounds x and y will dissolve in NaOH .$ (3) $Both compounds x and y will burn with sooty flame.$ (4) $Compound x is more acidic than compound y .$ 388. $The major is$ (1) $C H_{3} - C (O H) (P h) - C H_{2} - C H_{2} - C H_{3}$ (2) $C H_{3} - C (O H) (P h) - C H_{2} - C H_{2} - C H_{2} B r$ (3) (4) $C H_{3} - C (= O) - C H_{2} - C H_{2} - C H_{2} - P h$ 389. $Phenol on oxidation in air gives$ (1) $quinone$ (2) $catechol$ (3) $resorcinol$ (4) $o -cresol$ 390. $A solution of phenol in chloroform when treated with aqueous NaOH gives compound P as a major product. The mass percentage of carbon in P is. (to the nearest integer) (Atomic mass: C = 12; H = 1; O = 16)$