Aldehydes & Ketones PYQs Set 8 (PDF)

Set 8 of 9 · Questions 211-240 of 264

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Mere Teacher · Previous Year Questions NEET Chemistry · Aldehydes & Ketones · Set 8 (Q211-240)
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211. $Statement I: Aldehyde on reaction with HCN gives Cyanohydrin. Statement II: Cyanohydrin is a compound which consists of hydroxy and cyano groups on the same carbon. Choose the correct answer from the following with reference to above statements.$ (1) $Both statements I and II are false$ (2) $Both statements I and II are true$ (3) $Statement I is true and Statement II is false$ (4) $Statement I is false and Statement II is true$ 212. $What are ' X' and ' Y' in the following reaction?$ (1) (2) (3) (4) 213. $Identify major product " X " formed in the following reaction :$ (1) (2) (3) (4) 214. $Consider the given reaction, the product 'X' is:$ (1) (2) (3) (4) 215. $What is the product of following reaction? Hex-3-ynal (i) NaBH_{4} (ii) PBr_{3} (iii) Mg/ether (iv) CO_{2} / H_{3} O^{+}$ (1) (2) (3) (4) 216. $The major products P and Q in the following reaction sequence are$ (1) (2) (3) (4) 217. $Ozonolysis of an organic compound 'A' produces acetone and propionaldehyde in equimolar mixture. Identify 'A' from the following compounds :$ (1) $1-Pentene$ (2) $2-Pentene$ (3) $2-Methyl-2-pentene$ (4) $2-Methyl-1-pentene$ 218. $When undergoes intramolecular aldol condensation, the major product formed is:$ (1) (2) (3) (4) 219. $When 2-butyne is treated with H_{2} /Lindlar's catalyst, compound X is produced as the major product and when treated with Na/liq. N H_{3} it produces Y as the major product. Which of the following statements is correct?$ (1) $X will have higher dipole moment and higher boiling point than Y.$ (2) $Y will have higher dipole moment and higher boiling point than X.$ (3) $X will have lower dipole moment and lower boiling point than Y.$ (4) $Y will have higher dipole moment and lower boiling point than X.$ 220. $The correct statement regarding a carbonyl compound with a hydrogen atom on its alpha‐carbon, is$ (1) $a carbonyl compound with a hydrogenatom on its alpha‐carbon rapidly equilibrates with its correspondingenol and this process is known as carbonylation$ (2) $a carbonyl compound with a hydrogenatom on its alpha‐carbon rapidlyequilibrates with its correspondingenol and this process is known as keto‐enol tautomerism$ (3) $a carbonyl compound with a hydrogen atom on its alpha‐carbon never equilibrates with its corresponding enol$ (4) $a carbonyl compound with a hydrogen atom on its alpha‐carbon rapidly equilibrates with its correspondingenol and this process is known as aldehyde‐ketone equilibration.$ 221. $The hydrocarbon which can react with sodium in liquid ammonia is:$ (1) $CH3CH2C\equivCH$ (2) $C H_{3} CH= C H C H_{3}$ (3) $CH3CH2C\equivCCH2CH3$ (4) $CH3CH2CH2C\equivCCH2CH2CH3$ 222. $Acetaldehyde on reaction with Grignard reagent and subsequent hydrolysis yields$ (1) $3^{\circ} alcohol$ (2) $1^{\circ} alcohol$ (3) $2^{\circ} alcohol$ (4) $both 1^{\circ} and 2^{\circ} alcohols.$ 223. $Assertion : Dimethylsulphide is commonly used for the reduction of an ozonide of an alkene to get the carbonyl compounds Reason : It reduces the ozonide giving water soluble dimethyl sulphoxide and excess of it evaporates$ (1) $Assertion is True, Reason is True; Reason is a correct explanation for Assertion.$ (2) $Assertion is True, Reason is True; Reason is NOT a correct explanation for Assertion.$ (3) $Assertion is True, Reason is False.$ (4) $Assertion is False, Reason is True.$ 224. $What is the major product of the following reaction?$ (1) (2) (3) (4) 225. $Which will have the highest enol content ?$ (1) (2) (3) (4) 226. $The compound that yields only ketonic compound/s on ozonolysis is$ (1) $but-2-ene$ (2) $pent-2ene$ (3) $2,3-dimethylbut-2-ene$ (4) $2-methylbut-2-ene,$ 227. $The major product in the following reaction sequence is$ (1) (2) (3) (4) 228. $Which of the following conditions or reaction sequence will NOT give acetophenone as the major product ?$ (1) $C_{6} H_{5} - C (= O) - H + C H_{3} M g B r$ (2) $H_{3} C - C (= O) - H + C_{6} H_{5} M g B r$ (3) $C_{6} H_{5} - C (= O) - O C_{2} H_{5} + 2 C H_{3} M g B r$ (4) $C_{6} H_{5} - C (= O) - C l + C H_{3} M g B r + C d C l_{2}$ 229. $Benzene on reaction with acetyl chloride in the presence of anhydrous AlCl_{3} gave the product P . The product P on reaction with methyl magnesium bromide followed by treatment with water furnished the product Q . The molecular formula of Q is$ (1) $C_{8} H_{10} O$ (2) $C_{8} H_{8} O$ (3) $C_{9} H_{12} O$ (4) $C_{9} H_{10} O$ 230. $Identify X, Y, Z in the following reaction sequence$ (1) (2) (3) (4) 231. $X and Y in the following reactions are$ (1) (2) (3) (4) 232. $Identify ' A' in the following reaction:$ (1) (2) $C H_{3} - C (C H_{3}) = N - N H_{2}$ (3) $C H_{3} - C (C_{2} H_{5}) = N - N H_{2}$ (4) 233. $Predict the correct intermediate and product in the following reaction. [NEET 2017] H_{3} C - C \equiv CH H_{2} O_{,} H_{2} SO_{4} HgSO_{4} Intermediate \to Product (A) (B)$ (1) $A = H_{3} C - C (S O_{4}) = C H_{2}; B = H_{3} C - C (= O) - C H_{3}$ (2) $A = H_{3} C - C (O H) = C H_{2}; B = H_{3} C - C (S O_{4}) = C H_{2}$ (3) $A = H_{3} C - C (= O) - C H_{3}; B = H_{3} C - C \equiv C H$ (4) $A = H_{3} C - C (O H) = C H_{2}; B = H_{3} C - C (= O) - C H_{3}$ 234. $Identify substrate ' A' in the following reaction. 2 n A Dimethyl cadmium 2 n Propanone + n Cadmium chloride$ (1) $Ethyl chloride$ (2) $Ethylene dichloride$ (3) $Ethanoyl chloride$ (4) $Ethylidene dichloride$ 235. $Identify the reagents A and B respectively in the following reactions. CH_{3} COOH A CH_{3} COCl B CH_{3} CHO$ (1) $SOCl_{2}, H_{2} / Pd - BaSO_{4}$ (2) $H_{2} / Pd - BaSO_{4}, SOCl_{2}$ (3) $SOCl_{2}, H_{2} O_{2}$ (4) $SOCl_{2}, O_{5} O_{4}$ 236. $The major product (P) in the following reaction is:$ (1) $P h - C H (O H) - C O O^{-} K^{+}$ (2) $P h - C H (O H) - C H_{2} O H$ (3) $P h - C (= O) - C O O^{-} K^{+}$ (4) $P h - C (= O) - C H_{2} O H$ 237. $Match List - I with List -II. Choose the correct answer from options given below:$ (1) $A-(III), (B)-(IV), (C)-(I), (D)-(II)$ (2) $A-(IV), (B)-(II), (C)-(I), (D)-(III)$ (3) $A-(IV), (B)-(II), (C)-(III), (D)-(I)$ (4) $A-(III), (B)-(IV), (C)-(II), (D)-(I)$ 238. $The reagent needed for converting is :$ (1) $Cat. Hydrogenation$ (2) $H_{2} /Lindlar Cat.$ (3) $Li/ N H_{3}$ (4) $L i A l H_{4}$ 239. $'R' formed in the following sequence of reaction is: o$ (1) (2) (3) (4) 240. $The ' X' in the following conversion is H_{3} CCH_{2} COOH \to x CH_{3} CHBrCOOH$ (1) $(i) Br_{2} / P red, (ii) H_{2} O$ (2) $(i) Br_{2} / CCl_{4}, (ii) H_{2} O$ (3) $Br_{2} / OH^{-}$ (4) $PBr_{3}$