Aldehydes & Ketones PYQs Set 6 (PDF)

Set 6 of 10 · Questions 151-180 of 285

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Mere Teacher · Previous Year Questions JEE Main Chemistry · Aldehydes & Ketones · Set 6 (Q151-180)
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151. $Considering the below reaction, the major product among the following is: (1) Zn, HCl (2) C r_{2}, O_{3}, 773 K 10 - 20 atm$ (1) (2) (3) (4) 152. $Acetamide is treated with the following reagents separately Which one of these would yield methyl amine?$ (1) $N a O H - B r_{2}$ (2) $Sodalime$ (3) $Hot conc. H_{2} S O_{4}$ (4) $P C l_{5}$ 153. $Which among the above compound/s does/do not form Silver mirror when treated with Tollen's reagent?$ (1) $(I), (III) and (IV) only$ (2) $Only (IV)$ (3) $Only (II)$ (4) $(III) and (IV) only$ 154. $Hydrogenation of the adjoining compound in the presence of poisoned palladium catalyst gives.$ (1) $an optically active compound$ (2) $an optically inactive compound$ (3) $a racemic mixture$ (4) $a diastereomeric mixture$ 155. $1-Propanol and 2-Propanol can be best distinguished by :$ (1) $oxidation with alkaline K M n O_{4} followed by reaction with Fehling solution$ (2) $oxidation with acidic dichromate followed by reaction with Fehling solution$ (3) $oxidation by heating with copper followed by reaction with Fehling solution$ (4) $oxidation with concentrated H_{2} S O_{4} followed by reaction with Fehling solution$ 156. $Which of the following compounds will give positive test with Tollens’ reagent?$ (1) $Acetic acid$ (2) $Acetone$ (3) $Acetamide$ (4) $Acetaldehyde$ 157. $Which of the following reaction leads to the formation of benzonitrile?$ (1) $Reaction of bromobenzene with KCN$ (2) $Reaction of aniline with NaNO_{2} and HCl at 273 K followed by the reaction with CuCN$ (3) $Reaction of bromobenzene with NaNO_{2} and HCl at 273 K followed by the reaction with CuCN$ (4) $Reaction of aniline with KCN$ 158. $Given below are two statements : Statements I : Acidity of α -hydrogens of aldehydes and ketones is responsible for Aldol reaction. Statement II : Reaction between benzaldehyde and ethanal will NOT give Cross - Aldol product. In the light of the above statements, choose the most appropriate answer from the options given below :$ (1) $Statement I is correct but Statement II is incorrect$ (2) $Both Statement I and Statement II are correct$ (3) $Both Statement I and Statement II are incorrect$ (4) $Statement I is incorrect but Statement II is correct$ 159. $Consider the following reactions$ (1) (2) (3) (4) 160. $A compound A with molecular formula C_{10} H_{13} Cl give a white precipitate on adding silver nitrate solution. A on reacting with alcoholic KOH gives compound B as the main product. B on ozonolysis gives C and D. C gives Cannizaro reaction but not aldol condensation. D gives aldol condensation but not Cannizaro reaction. A is :$ (1) $C_{6} H_{5} - C H_{2} - C H_{2} - C H_{2} - C H_{2} -Cl$ (2) $C_{6} H_{5} - C H_{2} - C H_{2} - C H (C l) - C H_{3}$ (3) (4) $C_{6} H_{5} - C H_{2} - C (C H_{3}) (C H_{3}) - C l$ 161. $The gas liberated by the electrolysis of Dipotassium succinate solution is :$ (1) $Ethane$ (2) $Ethyne$ (3) $Ethene$ (4) $Propene$ 162. $Which one of the following reactions will not result in the formation of carbonation bond ?$ (1) $Reimer-Tieman reaction$ (2) $Friedel Craft's acylation$ (3) $Wurtz reaction$ (4) $Cannizzaro reaction$ 163. $Consider the reaction: R C H O + N H_{2} N H_{2} \to R C H = N - N H_{2} What sort of reaction is it?$ (1) $Electrophlic addition‐elimination reaction$ (2) $Free radical addition‐elimination reaction$ (3) $Electrophilic substitution‐elimination reaction$ (4) $Nudeophilic addition‐elimination reaction$ 164. $Match the following columns. Column I (Compound/reagent) (A). Methanol (B). ZnCl_{2} / Conc . HCl (C). Rectified spirit D Dil. KMnO_{4} Column II (Other name/ chemical/name of the process) (I). Lucas reagent (II). Baeyer’s reagent (III). Wood spirit (IV). 95 % C_{2} H_{5} OH (V). 75 % C_{2} H_{5} OH (VI). 90 % C_{3} H_{7} OH A B C D$ (1) $IV I III II$ (2) $III I VI II$ (3) $III I IV II$ (4) $III II V I$ 165. $The main reduction product of the following compound with N a B H_{4} in methanol is :$ (1) (2) (3) (4) 166. $Consider the following reaction sequence : N The product ' B' is.:$ (1) (2) (3) (4) 167. $Identify the reagents used for the following conversion$ (1) $A = LiAlH_{4}, B = NaOH_{(aq)}, C = NH_{2} - NH_{2} / KOH, ethylene glycol$ (2) $A = LiAlH_{4}, B = NaOH_{(alc)}, C = Zn / HCl$ (3) $A = DIBAL-H, B = NaOH_{(aq)}, C = NH_{2} - NH_{2} / KOH, ethylene glycol$ (4) $A = DIBAL - H, B = NaOH_{(alc)}, C = Zn / HCl$ 168. $The major products P and Q in the following reactions are$ (1) (2) (3) (4) 169. $Choose the correct option for structures of A and B, respectively$ (1) $H_{2} N - C H (C H (C H_{3})_{2}) - C O O^{⊖} and H_{3} N + - C H (C H (C H_{3})_{2}) - C O O -$ (2) $H_{3} N + - C H (C H (C H_{3})_{2}) - C O O - and H_{3} N + - C H (C H (C H_{3})_{2}) - C O O H$ (3) $H_{3} N + - C H (C H (C H_{3})_{2}) - C O O H and H_{2} N - C H (C H (C H_{3})_{2}) - C O O -$ (4) $H_{2} N - C H (C H (C H_{3})_{2}) - C O O - and H_{3} N + - C H (C H (C H_{3})_{2}) - C O O H$ 170. $The final product 'A' in the following reaction sequence$ (1) $C H_{3} - C H = C (C H_{3}) - C O O H$ (2) $C H_{3} - C H = C (C H_{3}) - C N$ (3) $C H_{3} - C H - C (O H) (C H_{3}) - C O O H$ (4) $C H_{3} - C H = C (C H_{3}) - C O N H_{2}$ 171. $Nitration of phenyl benzoate yields the product$ (1) (2) (3) (4) 172. $Identify the product ' B' in the following reaction. Dry ice \to CH_{3} MgBr Dry ether A \to H_{2} O dil . HCl B$ (1) $Methanoic acid$ (2) $Ethanoic acid$ (3) $Methanol$ (4) $Ethanol$ 173. $For the reaction given below : The compound which is formed as a product in the reaction is a :$ (1) $compound with both alcohol and acid functional groups$ (2) $monocarboxylic acid$ (3) $dicarboxylic acid$ (4) $diol$ 174. $The structures of A and B formed in the following reaction are : [Ph=- C_{6} H_{5}]$ (1) (2) (3) (4) 175. $The product (P) of below reaction sequence$ (1) $C H_{3} C H_{2} C H = C (C H_{3}) - C H_{3}$ (2) $C H_{3} C H_{2} C H_{2} C H (C H_{3}) - C H_{2} O H$ (3) $C H_{3} C H_{2} C H = C (C H_{3}) - C H O$ (4) $C H_{3} C H_{2} C H = C (C H_{3}) - C O_{2} H$ 176. $The oxidation of toluene with C r O_{3} in the presence of (C H_{3} C O)_{2} O gives a product A, which on treatment with aqueous N a O H produces$ (1) $C_{6} H_{5} C O O N a$ (2) $2, 4‐diacetyl toluene$ (3) $C_{6} H_{5} C H O$ (4) $(C_{6} H_{5} C O)_{2} O$ 177. $Which one of the following used for purification of aldehydes?$ (1) $NaOCl$ (2) $NaHSO_{3}$ (3) $C_{6} H_{5} SO_{2} Cl$ (4) $Na_{2} SO_{4}$ 178. $The major products formed in the following reaction sequence A and B are :$ (1) (2) (3) (4) 179. $What is (P) in the reaction given below? (P) (i) CH_{3} MgBr (ii) H_{3} O^{+} (R) (i) dil. NaOH (ii) Δ 4-methyl-pent-3-en-2-one$ (1) $Propanone$ (2) $Ethanamine$ (3) $Ethane nitrile$ (4) $Ethane$ 180. $Identify the major product formed from the following$ (1) (2) (3) (4)