MCQOPTIONS
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MCQOPTIONS
This section includes 50 Mcqs, each offering curated multiple-choice questions to sharpen your VITEEE knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
RMgBr on reaction with an excess of oxygen followed by hydrolysis gives [Roorkee Qualifying 1998] |
| A. | RH |
| B. | ROOR |
| C. | ROOH |
| D. | ROH |
| Answer» E. | |
| 2. |
Reaction of aqueous sodium hydroxide on (i) ethyl bromide and (ii) chlorobenzene gives |
| A. | (i) Ethene and (ii) o-chlorophenol |
| B. | (i) Ethyl alcohol and (ii) o-chlorophenol |
| C. | (i) Ethyl alcohol and (ii) phenol |
| D. | (i) Ethyl alcohol an d(ii) no reaction |
| Answer» D. (i) Ethyl alcohol an d(ii) no reaction | |
| 3. |
Which one is not synthesized by Grignard reagent [MP PET 1991] |
| A. | Primary alcohol |
| B. | Secondary alcohol |
| C. | A ketone |
| D. | An ester |
| Answer» E. | |
| 4. |
Phenol is obtained by heating aqueous solution of [MP PMT 1995] |
| A. | Aniline |
| B. | Benzene diazonium chloride |
| C. | Benzoic acid |
| D. | None of these |
| Answer» C. Benzoic acid | |
| 5. |
Sodium benzene sulphonate reacts with NaOH and then on acidic hydrolysis, it gives [Roorkee 1995; KCET 1998] |
| A. | Phenol |
| B. | Benzoic acid |
| C. | Benzene |
| D. | Disodium benzaldehyde |
| Answer» B. Benzoic acid | |
| 6. |
Acetone on treatment with CH3−Mg−I and on further hydrolysis gives [UPSEAT 2000] |
| A. | Isopropyl alcohol |
| B. | Primary alcohol |
| C. | Acetic acid |
| D. | 2-methyl 2-propanol |
| Answer» E. | |
| 7. |
Oil +NaOH(aq)−→Δ Glycerol + Soap Above reaction is called [UPSEAT 2001] |
| A. | Saponification |
| B. | Esterification |
| C. | Hydrogenation |
| D. | None of these |
| Answer» B. Esterification | |
| 8. |
Grignard reagent reacts with compounds containing which of the following groups [MNR 1987] |
| A. | >C=O |
| B. | −C≡N |
| C. | >C=S |
| D. | All of these |
| Answer» E. | |
| 9. |
Absolute alcohol can be obtained from rectified spirit [KCET 1985] |
| A. | By removing the water in it using concentrated sulphuric acid |
| B. | By removing the water using phosphorus pentoxide |
| C. | By distilling with the appropriate amount of benzene |
| D. | By distilling over plenty of quick lime |
| Answer» D. By distilling over plenty of quick lime | |
| 10. |
Maltose on hydrolysis gives [BHU 1996; CPMT 2001] |
| A. | Mannose + glucose |
| B. | Galactose + glucose |
| C. | Glucose |
| D. | Mannose + fructose |
| Answer» D. Mannose + fructose | |
| 11. |
Phenolphthalein is obtained by heating phthalic anhydride with conc. H2SO4 and [BHU 1996] |
| A. | Benzyl alcohol |
| B. | Benzene |
| C. | Phenol |
| D. | Benzoic acid |
| Answer» D. Benzoic acid | |
| 12. |
The reaction, water gas (CO+H2)+H2673K,300 atmosphere in presence of the catalyst Cr2O3/ZnO is used for the manufacture of [MP PMT 1989] |
| A. | HCHO |
| B. | HCOOH |
| C. | CH3OH |
| D. | CH3COOH |
| Answer» D. CH3COOH | |
| 13. |
An organic compound dissolved in dry benzene evolved hydrogen on treatment with sodium. It is [NCERT 1981; SCRA 1990] |
| A. | A ketone |
| B. | An aldehyde |
| C. | A tertiary amine |
| D. | An alcohol |
| Answer» E. | |
| 14. |
If formaldehyde and potassium hydroxide are heated, then we get [CPMT 1989, 90; KCET 2000] |
| A. | Acetylene |
| B. | Methane |
| C. | Methyl alcohol |
| D. | Ethyl formate |
| Answer» D. Ethyl formate | |
| 15. |
Salicylaldehyde can be prepared from [CPMT 1983] |
| A. | Phenol and chloroform |
| B. | Phenol, chloroform and sodium hydroxide |
| C. | Phenol, carbon tetrachloride and NaOH |
| D. | None of these |
| Answer» C. Phenol, carbon tetrachloride and NaOH | |
| 16. |
The reaction given below is known as C2H5ONa+IC2H5→C2H5OC2H5+NaI [CPMT 1990; KCET 1990; MH CET 2003; Pb. CET 2002] |
| A. | Kolbes synthesis |
| B. | Wurtzs synthesis |
| C. | Williamsons synthesis |
| D. | Grignards synthesis |
| Answer» D. Grignards synthesis | |
| 17. |
Benzene diazonium chloride on boiling with dilute sulphuric acid gives [MP PMT 1983] |
| A. | Toluene |
| B. | Benzoic acid |
| C. | Benzene |
| D. | Phenol |
| Answer» E. | |
| 18. |
Benzyl alcohol is obtained from benzaldehyde by [CPMT 1983; MNR 1993] |
| A. | Fittigs reaction |
| B. | Cannizaros reaction |
| C. | Kolbes reaction |
| D. | Wurtzs reaction |
| Answer» C. Kolbes reaction | |
| 19. |
Formaldehyde gives an additive product with methyl magnesium iodide which on aqueous hydrolysis gives [MP PMT/PET 1988] |
| A. | Isopropyl alcohol |
| B. | Ethyl alcohol |
| C. | Methyl alcohol |
| D. | Propyl alcohol |
| Answer» C. Methyl alcohol | |
| 20. |
LiAlH4 converts acetic acid into [CPMT 1977; MP PMT 1990, 92] |
| A. | Acetaldehyde |
| B. | Methane |
| C. | Ethyl alcohol |
| D. | Methyl alcohol |
| Answer» D. Methyl alcohol | |
| 21. |
On heating aqueous solution of benzene diazonium chloride, which is formed [CPMT 1988; BHU 1980] |
| A. | Benzene |
| B. | Chlorobenzene |
| C. | Phenol |
| D. | Aniline |
| Answer» D. Aniline | |
| 22. |
Primary alcohols can be obtained from the reaction of the RMgX with [Pb. PMT 2001] |
| A. | CO2 |
| B. | HCHO |
| C. | CH3CHO |
| D. | H2O |
| Answer» C. CH3CHO | |
| 23. |
In the commercial manufacture of ethyl alcohol from starchy substances by fermentation method, which enzymes stepwise complete the fermentation reaction [BIT 1992] |
| A. | Diastase, maltase and zymase |
| B. | Maltase, zymase and invertase |
| C. | Diastase, zymase and lactase |
| D. | Diastase, invertase and zymase |
| Answer» B. Maltase, zymase and invertase | |
| 24. |
Chlorination of toluene in the presence of light and heat followed by treatment with aqueous NaOH gives [IIT-JEE 1990] |
| A. | o-cresol |
| B. | p-cresol |
| C. | 2, 4-dihydroxy toluene |
| D. | Benzyl alcohol |
| Answer» E. | |
| 25. |
Which enzyme converts glucose and fructose both into ethanol [MP PMT 1989, 90, 96; CPMT 1983, 84, 86, 94; KCET 1989; MNR 1978; MP PET 1994, 99] |
| A. | Diastase |
| B. | Invertase |
| C. | Zymase |
| D. | Maltase |
| Answer» D. Maltase | |
| 26. |
Coconut oil upon alkaline hydrolysis gives [MP PET 1991; AFMC 2000; KCET 2001; BCECE 2005] |
| A. | Glycol |
| B. | Alcohol |
| C. | Glycerol |
| D. | Ethylene oxide |
| Answer» D. Ethylene oxide | |
| 27. |
The fermentation of starch to give alcohol occurs mainly with the help of [CPMT 1971; MH CET 1999; RPMT 2000] |
| A. | O2 |
| B. | Air |
| C. | CO2 |
| D. | Enzymes |
| Answer» E. | |
| 28. |
Which one of the following will produce a primary alcohol by reacting with CH3MgI [MP PET 1991] |
| A. | Acetone |
| B. | Methyl cyanide |
| C. | Ethylene oxide |
| D. | Ethyl acetate |
| Answer» D. Ethyl acetate | |
| 29. |
Propene, CH3−CH=CH2 can be converted to 1-propanol by oxidation. Which set of reagents among the following is ideal to effect the conversion [CBSE PMT 1991] |
| A. | Alkaline KMnO4 |
| B. | B2H6 and alkaline H2O2 |
| C. | O3/Zn dust |
| D. | OsO4/CH4,Cl2 |
| Answer» C. O3/Zn dust | |
| 30. |
Ethyl alcohol is industrially prepared from ethylene by [CPMT 1985] |
| A. | Permanganate oxidation |
| B. | Catalytic reduction |
| C. | Absorbing in H2SO4 followed by hydrolysis |
| D. | Fermentation |
| Answer» D. Fermentation | |
| 31. |
Ethanol is prepared industrially by [MP PMT 1989]Ethanol is prepared industrially by [MP PMT 1989] |
| A. | Hydration of ethylene |
| B. | Fermentation of sugars |
| C. | Both the above |
| D. | None of these |
| Answer» D. None of these | |
| 32. |
Methyl phenyl ether can be obtained by reacting |
| A. | phenolate ions and methyl iodide |
| B. | methoxide ions and bromobenzene |
| C. | methanol and phenol |
| D. | bromobenzene and methyl bromide |
| Answer» B. methoxide ions and bromobenzene | |
| 33. |
Methanol cannot be dried with anhydrous CaCl2 because |
| A. | CaCl2 dissolves in it |
| B. | it is not good dehydrating agent |
| C. | it forms a solid CaCl2 × 4CH3OH |
| D. | it reacts with CH3OH |
| Answer» D. it reacts with CH3OH | |
| 34. |
In Williamson's synthesis |
| A. | an alcohol is heated with conc. H2SO4 at 140°C |
| B. | an alkyl halide is treated with sodium |
| C. | an alkyl halide is treated with sodium alkoxide |
| D. | None of the above |
| Answer» D. None of the above | |
| 35. |
In preparation of alkene from alcohol using Al2O3 which is effective factor: |
| A. | Porosity of Al2O3 |
| B. | Temperature |
| C. | Concentration |
| D. | Surface area of Al2O3 |
| Answer» C. Concentration | |
| 36. |
From amongst the following alcohols the one that would react fastest with conc. HCl and anhydrous ZnCl2, is |
| A. | 2-Methylpropan-2-ol |
| B. | 2-Butanol |
| C. | 1-Butanol |
| D. | 2-Methylpropanol |
| Answer» B. 2-Butanol | |
| 37. |
Formation of diethyl ether from ethanol is based on a |
| A. | dehydration reaction |
| B. | dehydrogenation reaction |
| C. | hydrogenation reaction |
| D. | heterolytic fission reaction |
| Answer» B. dehydrogenation reaction | |
| 38. |
Ethyl chloride is converted into diethyl ether by |
| A. | Perkins reaction |
| B. | Grignard reagent |
| C. | Wurtz reaction |
| D. | Williamsons synthesis |
| Answer» E. | |
| 39. |
Denatured alcohol is |
| A. | Rectified spirit + methanol + naphtha |
| B. | Undistilled ethanol |
| C. | Rectified spirit |
| D. | Ethanol + methanol |
| Answer» B. Undistilled ethanol | |
| 40. |
Among the following, which one cannot be formed as a product under any conditions? |
| A. | Ethylene |
| B. | Ethyl-hydrogen sulphate |
| C. | Diethyl ether |
| D. | Acetylene |
| Answer» E. | |
| 41. |
Chloro ethane reacts with X to form diethyl ether. What is X |
| A. | NaOH |
| B. | H2SO4 |
| C. | C2H5ONa |
| D. | Na2S2O3 |
| Answer» D. Na2S2O3 | |
| 42. |
Catalytic dehydrogenation of a primary alcohol gives a |
| A. | ketone |
| B. | aldehyde |
| C. | secondary alcohol |
| D. | ester |
| Answer» C. secondary alcohol | |
| 43. |
Anisole can be prepared by the action of methyl iodide on sodium phenate. The reaction is called |
| A. | Fittig’s reaction |
| B. | Williamson’s reaction |
| C. | Wurtz’s reaction |
| D. | Etard’s reaction |
| Answer» D. Etard’s reaction | |
| 44. |
An oxygen containing organic compound upon oxidation forms a carboxylic acid as the only organic product with its molecular mass higher by 14 units. The organic compound is ______. |
| A. | a ketone |
| B. | an aldehyde |
| C. | a primary alcohol |
| D. | a secondary alcohol |
| Answer» D. a secondary alcohol | |
| 45. |
An organic compound A(C4H9Cl) on reaction with Na/diethyl ether gives a hydrocarbon which on monochlorination gives only one chloro derivative then, A is: |
| A. | iso-butyl chloride |
| B. | secondary butyl chloride |
| C. | t-butyl chloride |
| D. | n-butyl chloride |
| Answer» D. n-butyl chloride | |
| 46. |
An organic compound A containing C, H and O has a pleasant odour with boiling point of 78°C. On boiling A with concentrated H2SO4, a colourless gas is produced gas is produced which decolourises bromine water and alkaline KMnO4. The organic liquid A is |
| A. | C2H5COOCH3 |
| B. | C2H5OH |
| C. | C2H5Cl |
| D. | C2H6 |
| Answer» C. C2H5Cl | |
| 47. |
An ether is more volatile than an alcohol having the same molecular formula. This is due to |
| A. | dipolar character of ethers |
| B. | alcohols having resonance structures |
| C. | inter-molecular hydrogen bonding in ethers |
| D. | inter-molecular hydrogen bonding in alcohols |
| Answer» E. | |
| 48. |
Among the following, which is least acidic? |
| A. | phenol |
| B. | o-cresol |
| C. | p-nitrophenol |
| D. | p-chlorophenol |
| Answer» C. p-nitrophenol | |
| 49. |
Among the alkenes which one produces tertiary butyl alcohol on acid hydration |
| A. | (CH3)2C = CH2 |
| B. | CH3 – CH = CH – CH3 |
| C. | CH3 – CH2 – CH = CH2 |
| D. | CH3 – CH = CH2 |
| Answer» B. CH3 – CH = CH – CH3 | |
| 50. |
Acid catalysed hydration of alkenes except ethene leads to the formation of |
| A. | mixture of secondary and tertiary alcohols |
| B. | mixture of primary and secondary alcohols |
| C. | secondary or tertiary alcohol |
| D. | primary alcohol |
| Answer» D. primary alcohol | |