MCQOPTIONS
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MCQOPTIONS
This section includes 33 Mcqs, each offering curated multiple-choice questions to sharpen your Bachelor of Pharmacy (BDot Pharma) knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following compounds is used in antiknock compositions to prevent the deposition of oxides of lead on spark plug, combustion chamber and exhaust pipe . |
| A. | Glycerol |
| B. | Glycol |
| C. | 1, 2-dibromoethane |
| D. | Benzene |
| Answer» D. Benzene | |
| 2. |
Reduction of CO to 2CH can be carried out with |
| A. | Catalytic reduction |
| B. | Na/ C2 H5 OH |
| C. | Wolf-Kischner reduction |
| D. | LiAlH4 |
| Answer» D. LiAlH4 | |
| 3. |
The chemical added to leaded petrol to prevent the deposition of lead in the combustion chamber is |
| A. | Iso-octane |
| B. | Ethylene dibromide |
| C. | Tetraethyl lead |
| D. | Mercaptan |
| Answer» C. Tetraethyl lead | |
| 4. |
Which of the following fractions of petroleum refining contains kerosene ? (Boiling ranges in o C are given below) |
| A. | 40 80 |
| B. | 80 - 200 |
| C. | 200 - 300 |
| D. | Above 300 |
| Answer» D. Above 300 | |
| 5. |
In the preparation of alkanes; a concentrated aqueous solution of sodium or potassium salts of saturated carboxylic acid are subjected to |
| A. | Hydrolysis |
| B. | Oxidation |
| C. | Hydrogenation |
| D. | Electrolysis |
| Answer» E. | |
| 6. |
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» B. An acid | |
| 7. |
A petroleum fraction having boiling range 70-200 C and containing 6-10 carbon atoms per molecule is called .. |
| A. | Natural gas |
| B. | Gas oil |
| C. | Gasoline |
| D. | Kerosene |
| Answer» D. Kerosene | |
| 8. |
In order to make alcohol undrinkable pyridine and methanol are added to it. The resulting alcohol is called |
| A. | Power alcohol |
| B. | Proof spirit |
| C. | Denatured spirit |
| D. | Poison alcohol |
| Answer» D. Poison alcohol | |
| 9. |
Formaldehyde when treated with KOH gives methanol and potassium formate. The reaction is known as .. |
| A. | Perkin reaction |
| B. | Claisen reaction |
| C. | Cannizzaro reaction |
| D. | Knoevenagel reaction |
| Answer» D. Knoevenagel reaction | |
| 10. |
Which of the following statements regarding chemical properties of acetophenone are wrong (1) It is reduced to methyl phenyl carbinol by sodium and ethanol(2) It is oxidised to benzoic acid with acidified KMnO4(3) It does not undergo iodoform electrophilic substitution like nitration at meta position(4) It does not undergo iodoform reaction with iodine and alkali |
| A. | 1 and 2 |
| B. | 2 and 4 |
| C. | 3 and 4 |
| D. | 1 and 3 |
| Answer» D. 1 and 3 | |
| 11. |
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» D. o Chlorobenzaldehyde | |
| 12. |
Consider the following statement Acetophenone can be prepared by i. Oxidation of 1-phenylethanol ii. Reaction of benzalthanol with methyl magnesium bromide iii. Friedel craft s reaction of benzene with acetyl chloride iv. Distillation of calcium benzoate |
| A. | 1 and 2 |
| B. | 1 and 4 |
| C. | 1 and 3 |
| D. | 3 and 4 |
| Answer» D. 3 and 4 | |
| 13. |
Formaldehyde gives an additive product with methyl magnesium iodide which on aqueous hydrolysis gives .. |
| A. | Isopropyl alcohol |
| B. | Ethyl alcohol |
| C. | Methyl alcohol |
| D. | Propyl alcohol |
| Answer» C. Methyl alcohol | |
| 14. |
Aromatic aldehyde undergo disproportionation in presence of sodium or potassium hydroxide to give corresponding alcohol and acid. The reaction is known as .. |
| A. | Wurtz's reaction |
| B. | Cannizzaro reaction |
| C. | Friedel-Craft's reaction |
| D. | Claisen reaction |
| Answer» C. Friedel-Craft's reaction | |
| 15. |
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» D. Acetone | |
| 16. |
Which is the best antiknock compound or Which one of the following substances is used as an antiknock compound |
| A. | Lead tetrachloride |
| B. | Lead acetate |
| C. | Zinc ethyl |
| D. | Tetraethyl lead (TEL) |
| Answer» E. | |
| 17. |
On heating glycerol with conc. H2SO4 a compound is obtained which has a bad odour. The compound is .. |
| A. | Glycerol sulphate |
| B. | Acrolein |
| C. | Formic acid |
| D. | Allyl alcohol |
| Answer» C. Formic acid | |
| 18. |
The number of possible enantiomeric pairs that can be produced during monochlorination of 2- methylbutane is .. |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 1 |
| Answer» B. 3 | |
| 19. |
On reaction with hot conc. H2SO4 which one of the following compounds loses a molecule of water . |
| A. | CH3COCH3 |
| B. | CH3COOH |
| C. | CH3OCH3 |
| D. | CH3CH2OH |
| Answer» E. | |
| 20. |
Which of the following organic compounds exhibits positive Fehling test as well as iodoform test . |
| A. | Methanal |
| B. | Ethanol |
| C. | Propanone |
| D. | Ethanal |
| Answer» E. | |
| 21. |
In the dichlorination reaction of propane, mixture of products are obtained. How many isomers, the mixture contains |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» D. 5 | |
| 22. |
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» E. | |
| 23. |
A sample of petrol is a mixture of 30% n-heptane and 70% iso-octane. The sample has octane number |
| A. | 30 |
| B. | 70 |
| C. | 15 |
| D. | 35 |
| Answer» C. 15 | |
| 24. |
Which one of the following compounds is prepared in the laboratory from benzene by a substitution reaction |
| A. | Glyoxal |
| B. | Cyclohexane |
| C. | Acetophenone |
| D. | Hexabromo cyclohexane |
| Answer» D. Hexabromo cyclohexane | |
| 25. |
Of the five isomeric hexanes, the isomer which can give two monochlorinated compounds is .. |
| A. | n-hexane |
| B. | 2, 3-dimethylbutane |
| C. | 2, 2-dimethylbutane |
| D. | 2-methylpentane |
| Answer» C. 2, 2-dimethylbutane | |
| 26. |
Acetophenone is prepared by the reaction of which of the following in the presence of AlCl3 catalyst .. |
| A. | Phenol and acetic acid |
| B. | Benzene and acetone |
| C. | Benzene and acetyl chloride |
| D. | Phenol and acetone |
| Answer» D. Phenol and acetone | |
| 27. |
The compound obtained by the reduction of propionaldehyde by amalgamated zinc and concentrated HCl is . |
| A. | Propanol |
| B. | Propane |
| C. | Propene |
| D. | All of these |
| Answer» C. Propene | |
| 28. |
When a mixture of methane and oxygen is passed through heated molybdenum oxide, the main product formed is .. |
| A. | Methanoic acid |
| B. | Ethanal |
| C. | Methanol |
| D. | Methanal |
| Answer» E. | |
| 29. |
A compound X with molecular formula C3H8O can be oxidised to a compound Y with the molecular formula C3H6O2 X is most likely to be .. |
| A. | Primary alcohol |
| B. | Secondary alcohol |
| C. | Aldehyde |
| D. | Ketone |
| Answer» B. Secondary alcohol | |
| 30. |
Which of the following cycloalkane gives open chain compound, when reacts with bromine .. |
| A. | Cyclopropane |
| B. | Cyclopentane |
| C. | Cyclohexane |
| D. | Cyclo-octane |
| Answer» B. Cyclopentane | |
| 31. |
Which of the following products is formed when benzaldehyde is treated with CH3 MgBr and the addition product so obtained is subjected to acid hydrolysis. |
| A. | Secondary alcohol |
| B. | A primary alcohol |
| C. | Phenol |
| D. | Tert-Butyl alcohol |
| Answer» B. A primary alcohol | |
| 32. |
Grignard reagent is not prepared in aqueous medium but prepared; in ether medium because the reagent .. |
| A. | Reacts with water |
| B. | Is insoluble in water |
| C. | Is highly reactive in ether |
| D. | Becomes inactive in water |
| Answer» B. Is insoluble in water | |
| 33. |
Benzyl alcohol and sodium benzoate is obtained by the action of sodium hydroxide on benzaldehyde. This reaction is known as |
| A. | Perkin s reaction |
| B. | Cannizzaro s reaction |
| C. | Sandmeyer s reaction |
| D. | Claisen condensation |
| Answer» C. Sandmeyer s reaction | |