MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
An organic compound A reacts with sodium metal and forms B. On heating with conc. \[{{H}_{2}}S{{O}_{4}},\] A gives diethyl ether. A and B are [AFMC 1998] |
| A. | \[{{C}_{2}}{{H}_{5}}OH\] and \[{{C}_{2}}{{H}_{5}}ONa\] |
| B. | \[{{C}_{3}}{{H}_{7}}OH\] and \[C{{H}_{3}}ONa\] |
| C. | \[C{{H}_{3}}OH\] and \[C{{H}_{3}}ONa\] |
| D. | \[{{C}_{4}}{{H}_{9}}OH\] and \[{{C}_{4}}{{H}_{9}}ONa\] |
| Answer» B. \[{{C}_{3}}{{H}_{7}}OH\] and \[C{{H}_{3}}ONa\] | |
| 2. |
Which statement is not correct about alcohol [AFMC 1997] |
| A. | Alcohol is lighter than water |
| B. | Alcohol evaporates quickly |
| C. | Alcohol of less no. of carbon atoms is less soluble in water than alcohol of high no. of carbon atoms |
| D. | All of these |
| Answer» D. All of these | |
| 3. |
The order of stability of carbonium ions is [MP PET 1996] |
| A. | Methyl > ethyl > iso-propyl > tert-butyl |
| B. | Tert-butyl > iso-propyl > ethyl > methyl |
| C. | Iso-propyl > tert-butyl > ethyl > methyl |
| D. | Tert-butyl > ethyl > iso-propyl > methyl |
| Answer» C. Iso-propyl > tert-butyl > ethyl > methyl | |
| 4. |
The reaction of \[{{C}_{2}}{{H}_{5}}OH\] with \[{{H}_{2}}S{{O}_{4}}\] does not give [MP PET 1996] |
| A. | Ethylene |
| B. | Diethyl ether |
| C. | Acetylene |
| D. | Ethyl hydrogen sulphate |
| Answer» D. Ethyl hydrogen sulphate | |
| 5. |
Sodium phenoxide reacts with \[C{{O}_{2}}\] at \[400K\] and 4-7 atm pressure to give [MP PET 1996] |
| A. | Sodium salicylate |
| B. | Salicylaldehyde |
| C. | Catechol |
| D. | Benzoic acid |
| Answer» B. Salicylaldehyde | |
| 6. |
In \[C{{H}_{3}}C{{H}_{2}}OH\underset{{{350}^{o}}C}{\mathop{\xrightarrow{X}}}\,C{{H}_{2}}=C{{H}_{2}}+{{H}_{2}}O;\] 'X' is |
| A. | NaCl |
| B. | \[CaC{{l}_{2}}\] |
| C. | \[{{P}_{2}}{{O}_{5}}\] |
| D. | \[A{{l}_{2}}{{O}_{3}}\] |
| Answer» E. | |
| 7. |
Cresol has [CPMT 2003] |
| A. | Alcoholic ? \[OH\] |
| B. | Phenolic ? \[OH\] |
| C. | ? \[COOH\] |
| D. | ? \[CHO\] |
| Answer» C. ? \[COOH\] | |
| 8. |
The compound which gives the most stable carbonium on dehydration is [MNR 1995] |
| A. | \[\underset{\underset{C{{H}_{3}}\,\,\,\,\,}{\mathop{|\,\,\,\,\,\,\,\,\,}}\,}{\mathop{C{{H}_{3}}-CH-C{{H}_{2}}OH}}\,\] |
| B. | \[\begin{matrix} \,\,\,\,\,\,\,C{{H}_{3}} \\ | \\ C{{H}_{3}}-C-OH\,\, \\ | \\ \,\,\,\,\,\,C{{H}_{3}} \\ \end{matrix}\] |
| C. | \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}OH\] |
| D. | \[\underset{\underset{OH\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}}\,}{\mathop{C{{H}_{3}}-CH-C{{H}_{2}}-C{{H}_{3}}}}\,\] |
| Answer» C. \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}OH\] | |
| 9. |
Phenol is less acidic than [MNR 1995] |
| A. | Ethanol |
| B. | Methanol |
| C. | o-nitrophenol |
| D. | p-methylphenol |
| Answer» D. p-methylphenol | |
| 10. |
Methyl alcohol can be distinguished from ethyl alcohol using [KCET 1984; BHU 2000] |
| A. | Fehling solution |
| B. | Schiff's reagent |
| C. | Sodium hydroxide and iodine |
| D. | Phthalein fusion test |
| Answer» D. Phthalein fusion test | |
| 11. |
During dehydration of alcohols to alkenes by heating with conc.\[{{H}_{2}}S{{O}_{4}}\] the initiation step is [AIEEE 2003] |
| A. | Protonation of alcohol molecule |
| B. | Formation of carbocation |
| C. | Elimination of water |
| D. | Formation of an ester |
| Answer» B. Formation of carbocation | |
| 12. |
Which of the following product is formed, when ether is exposed to air [AIIMS 2000; RPMT 2002] |
| A. | Oxide |
| B. | Alkanes |
| C. | Alkenes |
| D. | Peroxide of diethyl ether |
| Answer» E. | |
| 13. |
The compound ?A? when treated with ceric ammonium nitrate solution gives yellow ppt. The compound ?A? is [MP PET 2002] |
| A. | Alcohol |
| B. | Aldehyde |
| C. | Acid |
| D. | Alkane |
| Answer» B. Aldehyde | |
| 14. |
The reaction of ethylene glycol with \[P{{I}_{3}}\]gives [MP PMT 2000] |
| A. | \[IC{{H}_{2}}C{{H}_{2}}I\] |
| B. | \[C{{H}_{2}}=C{{H}_{2}}\] |
| C. | \[C{{H}_{2}}=CHI\] |
| D. | \[ICH=CHI\] |
| Answer» C. \[C{{H}_{2}}=CHI\] | |
| 15. |
An unknown compound ?D?, first oxidised to aldehyde and then acitic acid by a dilute solution of\[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\]and\[{{H}_{2}}S{{O}_{4}}\]. The unknown compound ?D? is [BHU 2000] |
| A. | \[C{{H}_{3}}CHO\] |
| B. | \[C{{H}_{2}}C{{H}_{3}}OH\] |
| C. | \[C{{H}_{3}}C{{H}_{2}}OH\] |
| D. | \[C{{H}_{3}}C{{H}_{2}}C{{H}_{3}}\] |
| Answer» D. \[C{{H}_{3}}C{{H}_{2}}C{{H}_{3}}\] | |
| 16. |
Reaction : \[C{{H}_{3}}OH+{{O}_{2}}\underset{Ag}{\mathop{\xrightarrow{{{600}^{0}}C}}}\,\]product The product is [RPET 2000] |
| A. | \[C{{H}_{2}}=C=O\] |
| B. | \[{{H}_{2}}C=O\] |
| C. | \[{{C}_{2}}{{H}_{4}}\] |
| D. | \[{{C}_{2}}{{H}_{2}}\] |
| Answer» C. \[{{C}_{2}}{{H}_{4}}\] | |
| 17. |
The boiling point of alcohol are ?. than corresponding thiols [Pb. PMT 2000] |
| A. | More |
| B. | Same |
| C. | Either of these |
| D. | Less |
| Answer» B. Same | |
| 18. |
When Phenol is heated with phthalic anhydride in concentrated sulphuric acid and the hot reaction mixture is poured into a dilute solution of sodium hydroxide, the product formed is [MP PET 1997, 2003; RPMT 1999; KCET (Med.) 2000; CPMT 1981; CBSE PMT 1988] |
| A. | Alizarin |
| B. | Methyl orange |
| C. | Fluorescein |
| D. | Phenolphthalein |
| Answer» E. | |
| 19. |
\[C{{H}_{3}}-CH=CH-CH(OH)-C{{H}_{3}}\underset{\text{reagent}}{\mathop{\xrightarrow{\text{Jon }\!\!'\!\!\text{ s}}}}\,\]X, Product X is [RPET 2000] |
| A. | \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}CH(OH)C{{H}_{3}}\] |
| B. | \[C{{H}_{3}}CH=CHCOC{{H}_{3}}\] |
| C. | Both A and B are correct |
| D. | \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}COC{{H}_{3}}\] |
| Answer» C. Both A and B are correct | |
| 20. |
Boiling point of alcohol is comparatively higher than that corresponding alkane due to [MH CET 2002] |
| A. | Intermolecular hydrogen bonding |
| B. | Intramolecular hydrogen bonding |
| C. | Volatile nature |
| D. | None of these |
| Answer» B. Intramolecular hydrogen bonding | |
| 21. |
Which of the following statements is correct [BHU 1997] |
| A. | Phenol is less acidic than ethyl alcohol |
| B. | Phenol is more acidic than ethyl alcohol |
| C. | Phenol is more acidic than carboxylic acid |
| D. | Phenol is more acidic than carbonic acid |
| Answer» C. Phenol is more acidic than carboxylic acid | |
| 22. |
The reagent which easily reacts with ethanol and propanol is [MP PET 1989] |
| A. | Fehling solution |
| B. | Grignard reagent |
| C. | Schiff's reagent |
| D. | Tollen's reagent |
| Answer» C. Schiff's reagent | |
| 23. |
The alcohol that produces turbidity immediately with \[ZnC{{l}_{2}}+\] conc. HCl at room temperature [EAMCET 1997; MP PMT 1989, 99; IIT JEE 1981, 86; CBSE PMT 1989; CPMT 1989;MP PET 1997; JIPMER 1999] |
| A. | 1-hydroxybutane |
| B. | 2-hydroxybutane |
| C. | 2-hydroxy-2-methylpropane |
| D. | 1-hydroxy-2-methylpropane |
| Answer» D. 1-hydroxy-2-methylpropane | |
| 24. |
Propene is the product obtained by dehydrogenation of [KCET (Engg.) 2001] |
| A. | 2-propanol |
| B. | 1-propanol |
| C. | Propanal |
| D. | n-propyl alcohol |
| Answer» B. 1-propanol | |
| 25. |
Which is not correct [J & K 2005] |
| A. | Phenol is more acidic than acetic acid |
| B. | Ethanol is less acidic than phenol |
| C. | Ethanol has lower boiling point than ethane |
| D. | Ethyne is a non-linear molecule |
| Answer» B. Ethanol is less acidic than phenol | |
| 26. |
Reaction of phenol with chloroform/sodium hydroxide to give \[o\]-hydroxy benzaldehyde involves the formation of [J & K 2005] |
| A. | Dichloro carbene |
| B. | Trichloro carbene |
| C. | Chlorine atoms |
| D. | Chlorine molecules |
| Answer» B. Trichloro carbene | |
| 27. |
In which of the following reactions carbon carbon bond formation takes place [DPMT 2005] |
| A. | Cannizzaro |
| B. | Reimer-Tiemann |
| C. | HVZ reaction |
| D. | Schmidt reaction |
| Answer» C. HVZ reaction | |
| 28. |
[DPMT 2005] |
| A. | |
| B. | |
| C. | |
| D. | |
| Answer» B. | |
| 29. |
Tertiary butyl alcohol gives tertiary butyl chloride on treatment with [Orissa JEE 2005] |
| A. | Conc. \[HCl\]/anhydrous \[ZnC{{l}_{2}}\] |
| B. | \[KCN\] |
| C. | \[NaOCl\] |
| D. | \[C{{l}_{2}}\] |
| Answer» B. \[KCN\] | |
| 30. |
Which of the following reaction is correctly represented [Orissa JEE 2005] |
| A. | |
| B. | |
| C. | |
| D. | |
| Answer» B. | |
| 31. |
Benzenediazonium chloride on reaction with phenol in weakly basic medium gives [IIT-JEE 1998] |
| A. | Diphenyl ether |
| B. | p-hydroxyazobenzene |
| C. | Chlorobenzene |
| D. | Benzene |
| Answer» C. Chlorobenzene | |
| 32. |
\[{{C}_{2}}{{H}_{5}}OH\] can be differentiated from \[C{{H}_{3}}OH\] by [MP PMT 1994] |
| A. | Reaction with HCl |
| B. | Reaction with \[N{{H}_{3}}\] |
| C. | By iodoform test |
| D. | By solubility in water |
| Answer» D. By solubility in water | |
| 33. |
A compound does not react with 2.4 di-nitrophenyl hydrazine and Na , compound is [UPSEAT 2003] |
| A. | Acetone |
| B. | Acetaldehyde |
| C. | \[C{{H}_{3}}OH\] |
| D. | \[C{{H}_{2}}=CHOC{{H}_{3}}\] |
| Answer» E. | |
| 34. |
Which of the following compound is most acidic [BCECE 2005] |
| A. | \[C{{H}_{4}}\] |
| B. | \[{{C}_{2}}{{H}_{6}}\] |
| C. | \[CH\equiv CH\] |
| D. | \[{{C}_{2}}{{H}_{5}}OH\] |
| Answer» E. | |
| 35. |
The best method to prepare cyclohexene from cyclohexanol is by using [IIT 2005] |
| A. | Conc. HCl + ZnCl2 |
| B. | Conc. H3PO4 |
| C. | HBr |
| D. | Conc. HCl |
| Answer» C. HBr | |
| 36. |
On reaction with hot conc. \[{{H}_{2}}S{{O}_{4}},\] which one of the following compounds loses a molecule of water [CPMT 1989] |
| A. | \[C{{H}_{3}}COC{{H}_{3}}\] |
| B. | \[C{{H}_{3}}COOH\] |
| C. | \[C{{H}_{3}}OC{{H}_{3}}\] |
| D. | \[C{{H}_{3}}C{{H}_{2}}OH\] |
| Answer» E. | |
| 37. |
\[A\underset{\Delta }{\mathop{\xleftarrow{Cu}}}\,C{{H}_{3}}C{{H}_{2}}OH\underset{\Delta }{\mathop{\xrightarrow{A{{l}_{2}}{{O}_{3}}}}}\,B.\] A and B respectively are \[\] [RPMT/PET 2000] |
| A. | Alkene, alkanal |
| B. | Alkyne, alkanal |
| C. | Alkanal, alkene |
| D. | Alkene, alkyne |
| Answer» D. Alkene, alkyne | |
| 38. |
Which one of the following reactions would produce secondary alcohol [MP PET 1994] |
| A. | \[\overset{\overset{\,\,O}{\mathop{\,\,\,||}}\,}{\mathop{{{C}_{6}}{{H}_{5}}CC{{H}_{3}}}}\,\underset{2.{{H}^{+}}}{\mathop{\xrightarrow{1.C{{H}_{3}}MgBr}}}\,\] |
| B. | \[\overset{\overset{\,\,O}{\mathop{\,\,\,||}}\,}{\mathop{{{C}_{6}}{{H}_{5}}CC{{H}_{3}}}}\,\underset{2.{{H}^{+}}}{\mathop{\xrightarrow{1.LiAl{{H}_{4}}}}}\,\] |
| C. | \[C{{H}_{3}}CHO\underset{2.{{H}^{+}}}{\mathop{\xrightarrow{1.LiAl{{H}_{4}}}}}\,\] |
| D. | \[\overset{\overset{O}{\mathop{||}}\,}{\mathop{C{{H}_{3}}CC{{H}_{3}}}}\,\underset{2.B{{r}_{2}}}{\mathop{\xrightarrow{1.O{{H}^{-}}}}}\,\] |
| Answer» C. \[C{{H}_{3}}CHO\underset{2.{{H}^{+}}}{\mathop{\xrightarrow{1.LiAl{{H}_{4}}}}}\,\] | |
| 39. |
Which will dehydrate easily [Roorkee 1995] |
| A. | 3-methyl-2-butanol |
| B. | Ethyl alcohol |
| C. | 2-methyl propane-2-ol |
| D. | 2-methyl butanol-2 |
| Answer» E. | |
| 40. |
The dehydration of 2-methyl butanol with conc. \[{{H}_{2}}S{{O}_{4}}\] gives [UPSEAT 2004] |
| A. | 2-methyl butene as major product |
| B. | Pentene |
| C. | 2-methyl but-2-ene as major product |
| D. | 2-methyl pent-2-ene |
| Answer» B. Pentene | |
| 41. |
Isopropyl alcohol on oxidation forms [CPMT 1971, 81, 94; RPMT 2002] |
| A. | Acetone |
| B. | Ether |
| C. | Ethylene |
| D. | Acetaldehyde |
| Answer» B. Ether | |
| 42. |
What is formed when glycerol reacts with HI [DCE 2002] |
| A. | \[\underset{C{{H}_{2}}OH}{\overset{C{{H}_{2}}OH}{\mathop{\underset{|}{\overset{|}{\mathop{C}}}\,HI\ \ \ \ \,}}}\,\] |
| B. | \[\underset{C{{H}_{2}}I}{\overset{C{{H}_{2}}\ }{\mathop{\underset{|}{\overset{||}{\mathop{C}}}\,H\ \ }}}\,\] |
| C. | \[\underset{C{{H}_{3}}}{\overset{C{{H}_{3}}}{\mathop{\underset{|}{\overset{|}{\mathop{C}}}\,{{H}_{2}}}}}\,\] |
| D. | \[\underset{C{{H}_{3}}\ \ \ \ }{\overset{C{{H}_{2}}OH}{\mathop{\underset{|}{\overset{|}{\mathop{C}}}\,=O\ \ }}}\,\] |
| Answer» C. \[\underset{C{{H}_{3}}}{\overset{C{{H}_{3}}}{\mathop{\underset{|}{\overset{|}{\mathop{C}}}\,{{H}_{2}}}}}\,\] | |
| 43. |
Which of the following can work as a dehydrating agent for alcohols [BHU 1980] |
| A. | \[{{H}_{2}}S{{O}_{4}}\] |
| B. | \[A{{l}_{2}}{{O}_{3}}\] |
| C. | \[{{H}_{3}}P{{O}_{4}}\] |
| D. | All of these |
| Answer» E. | |
| 44. |
If there be a compound of the formula \[C{{H}_{3}}C{{(OH)}_{3}}\] which one of the following compounds would be obtained from it without reaction with any reagent [CPMT 1983] |
| A. | \[C{{H}_{3}}OH\] |
| B. | \[{{C}_{2}}{{H}_{5}}OH\] |
| C. | \[C{{H}_{3}}COOH\] |
| D. | HCHO |
| Answer» D. HCHO | |
| 45. |
The adduct of the compound 'A' obtained by the reaction with excess of isopropyl magnesium iodide, upon hydrolysis gives a tertiary alcohol. The compound 'A' is [MP PET 1985] |
| A. | An ester |
| B. | A secondary alcohol |
| C. | A primary alcohol |
| D. | An aldehyde |
| Answer» B. A secondary alcohol | |
| 46. |
Dehydration of 2-butanol yield [Pb. CET 2004] |
| A. | 1-butene |
| B. | 2-butene |
| C. | 2-butyne |
| D. | Both A and B |
| Answer» E. | |
| 47. |
When vapours of an alcohol are passed over hot reduced copper, alcohol is converted into alkene quickly, the alcohol is [CPMT 1985] |
| A. | Primary |
| B. | Secondary |
| C. | Tertiary |
| D. | None of these |
| Answer» D. None of these | |
| 48. |
Fats, on alkaline hydrolysis, gives [MH CET 2003] |
| A. | Oils |
| B. | Soaps |
| C. | Detergents |
| D. | Glycol + acid |
| Answer» C. Detergents | |
| 49. |
Ethyl alcohol is heated with conc. \[{{H}_{2}}S{{O}_{4}}\]. The product formed is [DCE 2004] |
| A. | \[C{{H}_{3}}-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-O{{C}_{2}}{{H}_{5}}\] |
| B. | \[{{C}_{2}}{{H}_{6}}\] |
| C. | \[{{C}_{2}}{{H}_{4}}\] |
| D. | \[{{C}_{2}}{{H}_{2}}\] |
| Answer» B. \[{{C}_{2}}{{H}_{6}}\] | |
| 50. |
Which of the following is used as catalyst for preparing Grignard reagent [Pb. CET 2002] |
| A. | Iron powder |
| B. | Dry ether |
| C. | Activated charcoal |
| D. | \[Mn{{O}_{2}}\] |
| Answer» C. Activated charcoal | |