McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Bachelor of Pharmacy (B. Pharma) , Pharmacy .
Chapters
| 251. |
The addition of HCN to carbonyl compounds is an example of ………. |
| A. | Nucleophilic substitution |
| B. | Electrophilic addition |
| C. | Nucleophilic addition |
| D. | Electrophilic substitution |
| Answer» C. Nucleophilic addition | |
| 252. |
Which of the following reagents is used to distinguish acetone and Acetophenone? |
| A. | NaHSO3 |
| B. | Grignard reagent |
| C. | Na2SO4 |
| D. | NHCl4 |
| Answer» A. NaHSO3 | |
| 253. |
The product formed by the reaction of chlorine with benzaldehyde in the absence of a catalyst is………….. |
| A. | Chlorobenzene |
| B. | Benzyl chloride |
| C. | Benzoyl Chloride |
| D. | o –Chlorobenzaldehyde |
| Answer» C. Benzoyl Chloride | |
| 254. |
Enol content is highest in………….. |
| A. | Acetone |
| B. | Acetophenone |
| C. | Acetic acid |
| D. | Acetyl acetone |
| Answer» D. Acetyl acetone | |
| 255. |
Which one of the following reacts with HCN and Tollen's reagent, but is not oxidised by Fehling's solution…………… |
| A. | Methanal |
| B. | Ethanal |
| C. | Benzaldehyde |
| D. | Acetone |
| Answer» C. Benzaldehyde | |
| 256. |
During reaction of benzaldehyde with alkali one of the product is………… |
| A. | Phenol |
| B. | Benzyl alcohol |
| C. | Benzene |
| D. | Benzophenone |
| Answer» B. Benzyl alcohol | |
| 257. |
Cannizzaro reaction is given by………… |
| A. | HCHO |
| B. | CH3COCH3CH |
| C. | CH3CHO |
| D. | CH3CH2OH |
| Answer» A. HCHO | |
| 258. |
When two molecules of acetaldehyde condense in the presence of dilute alkali, it forms…………. |
| A. | Acetal |
| B. | Sodium formate |
| C. | Aldol |
| D. | Methylene |
| Answer» C. Aldol | |
| 259. |
Acetaldehyde and acetone can be distinguished by…………… |
| A. | Molisch test |
| B. | Bromoform test |
| C. | Solubility in water |
| D. | Tollen's test |
| Answer» D. Tollen's test | |
| 260. |
Aldehyde turns pink with …………. |
| A. | Benedict solution |
| B. | Schiff reagent |
| C. | Fehling solution |
| D. | Tollen's reagent |
| Answer» B. Schiff reagent | |
| 261. |
Boiling point of acetone is………….. |
| A. | 56oC |
| B. | 60 oC |
| C. | 100o C |
| D. | 90oC |
| Answer» A. 56oC | |
| 262. |
The reagent with which both aldehyde and acetone react easily is……………. |
| A. | Fehling's reagent |
| B. | Grignard reagent |
| C. | Schiff's reagent |
| D. | Tollen's reagent |
| Answer» B. Grignard reagent | |
| 263. |
Acetal is obtained by reacting in the presence of dry HCl and alcohol with………….. |
| A. | Aldehyde |
| B. | Ketone |
| C. | Ether |
| D. | Carboxylic acid |
| Answer» A. Aldehyde | |
| 264. |
Which of the following is used to detect aldehydes………….. |
| A. | Million's test |
| B. | Tollen's reagent |
| C. | Neutral ferric chloride solution |
| D. | Molisch's test |
| Answer» B. Tollen's reagent | |
| 265. |
Which of the following aldehydes give red precipitate with Fehling solution ? |
| A. | Benzaldehyde |
| B. | Salicylaldehyde |
| C. | Acetaldehyde |
| D. | None of these |
| Answer» C. Acetaldehyde | |
| 266. |
Acetaldehyde and Acetone can be distinguished by……….. |
| A. | Iododorm test |
| B. | Nitroprusside test |
| C. | Fehling's solution test |
| D. | DNP test |
| Answer» C. Fehling's solution test | |
| 267. |
Which of the following will fail to react with potassium dichromate and dilute sulphuric acid…………… |
| A. | Ethyl alcohol (ethanol) |
| B. | Acetaldehyde (ethanal) |
| C. | Secondary propyl alcohol (2-propanol) |
| D. | Acetone (propanone) |
| Answer» D. Acetone (propanone) | |
| 268. |
The key step in cannizzaro’s reaction is the intermolecular shift of ………. |
| A. | Proton |
| B. | Hydride ion |
| C. | Hydronium ion |
| D. | Hydrogen bond |
| Answer» B. Hydride ion | |
| 269. |
A compound, containing only carbon, hydrogen and oxygen, has a molecular weight of 44. On complete oxidation it is converted into a compound of molecular weight 60. The original compound is ? |
| A. | An aldehyde |
| B. | An acid |
| C. | An alcohol |
| D. | an ether |
| Answer» A. An aldehyde | |
| 270. |
Which of the following has the most acidic hydrogen? |
| A. | 3-hexanone |
| B. | 2, 4-hexanedione |
| C. | 2, 5-hexanedione |
| D. | 2, 3-hexanedione |
| Answer» B. 2, 4-hexanedione | |
| 271. |
Which of the following statements regarding chemical properties of acetophenone are wrong……
|
| A. | 1 and 2 |
| B. | 2 and 4 |
| C. | 3 and 4 |
| D. | 1 and 3 |
| Answer» C. 3 and 4 | |
| 272. |
Which of the following will not give iodoform test ? |
| A. | Isopropyl alcohol |
| B. | Ethanol |
| C. | Ethanal |
| D. | Benzyl alcohol |
| Answer» D. Benzyl alcohol | |
| 273. |
What is color is Chloral hydrate? |
| A. | Yellow |
| B. | White |
| C. | Colourless |
| D. | None |
| Answer» C. Colourless | |
| 274. |
Aldol condensation is dose not ocurre between……….. |
| A. | Two different ketone |
| B. | Two different aldehyde |
| C. | An ketone and aldehyde |
| D. | An aldehyde and ester |
| Answer» D. An aldehyde and ester | |
| 275. |
In which of the following reaction new carbon carbon bond is not formed? |
| A. | Cannizzaro reaction |
| B. | Friedel craft reaction |
| C. | Wurtz reaction |
| D. | Aldol condensation |
| Answer» A. Cannizzaro reaction | |
| 276. |
Aromatic aldehydes reduce………… |
| A. | Tollen’s reagent |
| B. | Benedict’s reagent |
| C. | Fehling reagent |
| D. | All of above |
| Answer» A. Tollen’s reagent | |
| 277. |
Cross Cannizzaro reaction is given by……….. |
| A. | C6H5CHO |
| B. | C6H5CHO |
| C. | CH3CHO |
| D. | All of above |
| Answer» A. C6H5CHO | |
| 278. |
The product formed in aldol condensation is……………. |
| A. | Beta hydroxy acid |
| B. | Beta hydroxy aldehyde or ketone |
| C. | Alpha, beta unsaturated ester |
| D. | Alpha, hydroxy aldehyde or ketone |
| Answer» B. Beta hydroxy aldehyde or ketone | |
| 279. |
In which type of reaction cyanohydrin formed from acetone? |
| A. | Nucleophilic substitution |
| B. | Electrophilic substitution |
| C. | Nucleophilic addition |
| D. | Electrophilic addition |
| Answer» C. Nucleophilic addition | |
| 280. |
Which of the following react with water? |
| A. | ClCH2CH2Cl |
| B. | Cl3CCHO |
| C. | CCl4 |
| D. | All of above |
| Answer» B. Cl3CCHO | |
| 281. |
What is carbonyl group? |
| A. | OH |
| B. | C=O |
| C. | C- O |
| D. | None of above |
| Answer» B. C=O | |
Done Studing? Take A Test.
Great job completing your study session! Now it's time to put your knowledge to the test. Challenge yourself, see how much you've learned, and identify areas for improvement. Don’t worry, this is all part of the journey to mastery. Ready for the next step? Take a quiz to solidify what you've just studied.