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MCQOPTIONS
This section includes 11242 Mcqs, each offering curated multiple-choice questions to sharpen your Joint Entrance Exam - Main (JEE Main) knowledge and support exam preparation. Choose a topic below to get started.
| 2151. |
When heated with \[N{{H}_{3}}\] under pressure alone or in presence of zinc chloride phenols are converted into [RPMT 1997] |
| A. | Aminophenols |
| B. | Aniline |
| C. | Nitrobenzene |
| D. | Phenyl hydroxylamine |
| Answer» C. Nitrobenzene | |
| 2152. |
Which of the following produces violet colour with \[FeC{{l}_{3}}\] solution |
| A. | Enols |
| B. | Ethanol |
| C. | Ethanal |
| D. | Alkyl halides |
| Answer» B. Ethanol | |
| 2153. |
The boiling point of glycerol is more than propanol because of [CPMT 1997, 2002] |
| A. | Hydrogen bonding |
| B. | Hybridisation |
| C. | Resonance |
| D. | All the above |
| Answer» B. Hybridisation | |
| 2154. |
In the sequence of the following reactions [MP PMT 2002] \[C{{H}_{3}}C{{H}_{2}}OH\]\[\underset{\text{ChromicAcid}}{\mathop{\xrightarrow{[\text{O }\!\!]\!\!\text{ }}}}\,X\underset{\text{ChromicAcid}}{\mathop{\xrightarrow{[O]}}}\,\]\[C{{H}_{3}}COOH\] X is |
| A. | \[C{{H}_{3}}COC{{H}_{3}}\] |
| B. | \[C{{H}_{3}}CHO\] |
| C. | \[C{{H}_{3}}OC{{H}_{3}}\] |
| D. | \[C{{H}_{3}}C{{H}_{2}}COOH\] |
| Answer» C. \[C{{H}_{3}}OC{{H}_{3}}\] | |
| 2155. |
Liebermann's test is answered by [KCET 1998] |
| A. | Aniline |
| B. | Methylamine |
| C. | Ethyl benzoate |
| D. | Phenol |
| Answer» E. | |
| 2156. |
Phenol and benzoic acid is distinguished by [BHU 2003] |
| A. | \[NaOH\] |
| B. | \[NaHC{{O}_{3}}\] |
| C. | \[N{{a}_{2}}C{{O}_{3}}\] |
| D. | \[{{H}_{2}}S{{O}_{4}}\] |
| Answer» C. \[N{{a}_{2}}C{{O}_{3}}\] | |
| 2157. |
Which of the following would undergo dehydration most readily [UPSEAT 2000] |
| A. | 1-phenyl-1butanol |
| B. | 2-phenyl-2-butanol |
| C. | 1-phenyl-2-butanol |
| D. | 2-phenyl-1-butanol |
| Answer» D. 2-phenyl-1-butanol | |
| 2158. |
Rectified spirit obtained by fermentation contains 4.5% of water. So in order to remove it, rectified spirit is mixed with suitable quantity of benzene and heated. Benzene helps because [KCET 1987] |
| A. | It is dehydrating agent and so removes water |
| B. | It forms the lower layer which retains all the water so that alcohol can be distilled off |
| C. | It forms an azeotropic mixture having high boiling point and thus allows the alcohol to distill over |
| D. | It forms low boiling azeotropic mixtures which distill over, leaving behind pure alcohol which can then be distilled |
| Answer» E. | |
| 2159. |
Which reagent can convert acetic acid into ethanol [BVP 2003] |
| A. | \[Na+\]alcohol |
| B. | \[LiAl{{H}_{4}}+\] ether |
| C. | \[{{H}_{2}}+Pt\] |
| D. | \[Sn+HCl\] |
| Answer» C. \[{{H}_{2}}+Pt\] | |
| 2160. |
Compound ?A? reacts with \[PC{{l}_{5}}\] to give ?B? which on treatment with \[KCN\]followed by hydrolysis gave propanoic acid as the product. What is ?A? [CBSE PMT 2002] |
| A. | Ethane |
| B. | Propane |
| C. | Ethyl chloride |
| D. | Ethyl alcohol |
| Answer» E. | |
| 2161. |
Which of the following reagents convert the propene to 1-propanol [CBSE PMT 2000] |
| A. | \[{{H}_{2}}O,\ {{H}_{2}}S{{O}_{4}}\] |
| B. | Aqueous \[KOH\] |
| C. | \[MgS{{O}_{4}},\ NaB{{H}_{4}}/{{H}_{2}}O\] |
| D. | \[{{B}_{2}}{{H}_{6}},\ {{H}_{2}}{{O}_{2}},\ O{{H}^{-}}\] |
| Answer» C. \[MgS{{O}_{4}},\ NaB{{H}_{4}}/{{H}_{2}}O\] | |
| 2162. |
For phenol, which of the following statements is correct [MP PMT 1995] |
| A. | It is insoluble in water |
| B. | It has lower melting point compared to aromatic hydrocarbons of comparable molecular weight |
| C. | It has higher boiling point than toluene |
| D. | It does not show acidic property |
| Answer» D. It does not show acidic property | |
| 2163. |
The reaction of Lucas reagent is fast with [MP PMT 2000] |
| A. | \[{{\left( C{{H}_{3}} \right)}_{3}}COH\] |
| B. | \[{{(C{{H}_{3}})}_{2}}CHOH\] |
| C. | \[C{{H}_{3}}{{(C{{H}_{2}})}_{2}}OH\] |
| D. | \[C{{H}_{3}}C{{H}_{2}}OH\] |
| Answer» B. \[{{(C{{H}_{3}})}_{2}}CHOH\] | |
| 2164. |
In esterification, the reactivity of alcohols is [DPMT 2000] |
| A. | \[1{}^\circ >2{}^\circ >3{}^\circ \] |
| B. | \[3{}^\circ >2{}^\circ >1{}^\circ \] |
| C. | Same in all cases |
| D. | None of these |
| Answer» B. \[3{}^\circ >2{}^\circ >1{}^\circ \] | |
| 2165. |
The role of conc. \[{{H}_{2}}S{{O}_{4}}\]in the esterification process is [RPMT 1999] |
| A. | Catalyst |
| B. | Dehydrating agent |
| C. | Hydrolysing agent |
| D. | Dehydrating agent and catalyst |
| Answer» E. | |
| 2166. |
A compound that easily undergoes bromination is [KCET (Engg.) 2002] |
| A. | Phenol |
| B. | Toluene |
| C. | Benzene |
| D. | Benzoic acid |
| Answer» B. Toluene | |
| 2167. |
Which of the following has lowest boiling point [MH CET 1999] |
| A. | p-nitrophenol |
| B. | m-nitrophenol |
| C. | o-nitrophenol |
| D. | phenol |
| Answer» D. phenol | |
| 2168. |
An aromatic amine A was treated with alcoholic potash and another compound Y when foul smelling gas was formed with formula \[{{C}_{6}}{{H}_{5}}NC.\] Y was formed by reacting a compound Z with \[C{{l}_{2}}\] in the presence of slaked lime. The compound Z is [CBSE PMT 1990] |
| A. | \[{{C}_{6}}{{H}_{5}}N{{H}_{2}}\] |
| B. | \[{{C}_{2}}{{H}_{5}}OH\] |
| C. | \[C{{H}_{3}}OC{{H}_{3}}\] |
| D. | \[CHC{{l}_{3}}\] |
| Answer» C. \[C{{H}_{3}}OC{{H}_{3}}\] | |
| 2169. |
When phenol reacts with ammonia in presence of \[ZnC{{l}_{2}}\]at 300°C, it gives [AFMC 2001] |
| A. | Primary amine |
| B. | Secondary amine |
| C. | Tertiary amine |
| D. | Both B and C |
| Answer» B. Secondary amine | |
| 2170. |
Azo-dyes are prepared from [CPMT 2001] |
| A. | Aniline |
| B. | Benzaldehye |
| C. | Benzoic acid |
| D. | Phenol |
| Answer» E. | |
| 2171. |
Lucas test is used for [CBSE PMT 1990; AIIMS 2002; AFMC 2005] |
| A. | Alcohols |
| B. | Amines |
| C. | Diethyl ether |
| D. | Glacial acetic acid |
| Answer» B. Amines | |
| 2172. |
Ethyl alcohol on oxidation with \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] gives [MNR 1987; Bihar CEE 1995; UPSEAT 2000] |
| A. | Acetic acid |
| B. | Acetaldehyde |
| C. | Formaldehyde |
| D. | Formic acid |
| Answer» B. Acetaldehyde | |
| 2173. |
Methyl alcohol on oxidation with acidified \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] gives [MNR 1987] |
| A. | \[C{{H}_{3}}COC{{H}_{3}}\] |
| B. | \[C{{H}_{3}}CHO\] |
| C. | \[HCOOH\] |
| D. | \[C{{H}_{3}}COOH\] |
| Answer» D. \[C{{H}_{3}}COOH\] | |
| 2174. |
Primary and secondary alcohols on action of reduced copper give [CPMT 1982; MP PMT 1985; EAMCET 1987, 93; MP PET 1995] |
| A. | Aldehydes and ketones respectively |
| B. | Ketones and aldehydes respectively |
| C. | Only aldehydes |
| D. | Only ketones |
| Answer» B. Ketones and aldehydes respectively | |
| 2175. |
Primary alcohols on dehydration give [NCERT 1986] |
| A. | Alkenes |
| B. | Alkanes |
| C. | Both A and B |
| D. | None of these |
| Answer» B. Alkanes | |
| 2176. |
Which is obtained on treating phenol, with dilute \[HN{{O}_{3}}\] [BVP 2003] |
| A. | |
| B. | |
| C. | |
| D. | None of these |
| Answer» D. None of these | |
| 2177. |
With excess bromine, phenol reacts of form [BHU 2001] |
| A. | |
| B. | |
| C. | |
| D. | Mixture of A and B |
| Answer» D. Mixture of A and B | |
| 2178. |
Which of the following is acidic [CBSE PMT 2001; MH CET 2001] |
| A. | \[C{{H}_{3}}OH\] |
| B. | \[{{C}_{6}}{{H}_{5}}OH\] |
| C. | \[{{(C{{H}_{3}})}_{2}}CHOH\] |
| D. | \[C{{H}_{3}}C{{H}_{2}}OH\] |
| Answer» C. \[{{(C{{H}_{3}})}_{2}}CHOH\] | |
| 2179. |
An organic liquid A containing \[C,H\] and O has a pleasant odour with a boiling point of \[{{78}^{o}}C\] On boiling A with conc. \[{{H}_{2}}S{{O}_{4}}\] a colourless gas is produced which decolourises bromine water and alkaline \[KMn{{O}_{4}}.\] One mole of this gas also takes one mole of \[{{H}_{2}}.\] The organic liquid A is [KCET 1993] |
| A. | \[{{C}_{2}}{{H}_{5}}Cl\] |
| B. | \[{{C}_{2}}{{H}_{5}}CHO\] |
| C. | \[{{C}_{2}}{{H}_{6}}\] |
| D. | \[{{C}_{2}}{{H}_{5}}OH\] |
| Answer» E. | |
| 2180. |
Which of the following compounds is oxidised to prepare methyl ethyl ketone [DCE 2001] |
| A. | 2 - propanol |
| B. | 1 - butanol |
| C. | 2 - butanol |
| D. | Tert-butyl alcohol |
| Answer» D. Tert-butyl alcohol | |
| 2181. |
In the following series of chemical reactions, identify Z \[{{C}_{3}}{{H}_{7}}OH\underset{160-{{180}^{o}}C}{\mathop{\xrightarrow{Conc.{{H}_{2}}S{{O}_{4}}}}}\,X\underset{{}}{\mathop{\xrightarrow{B{{r}_{2}}}}}\,Y\underset{Alc.KOH}{\mathop{\xrightarrow{\text{Excess of}}}}\,Z\] [Manipal MEE 1995] |
| A. | \[\underset{\underset{\,\,\,\,\,\,\,\,\,\,\,\,N{{H}_{2}}\,\,\,\,N{{H}_{2}}}{\mathop{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|}}\,}{\mathop{C{{H}_{3}}-CH-C{{H}_{2}}}}\,\] |
| B. | \[\underset{\underset{\,\,\,\,\,\,\,\,\,\,OH\,\,\,\,\,OH}{\mathop{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|}}\,}{\mathop{C{{H}_{3}}-CH-C{{H}_{2}}}}\,\] |
| C. | \[\underset{\underset{OH}{\mathop{|}}\,}{\mathop{C{{H}_{3}}-C=C{{H}_{2}}}}\,\] |
| D. | \[C{{H}_{3}}C\equiv CH\] |
| Answer» E. | |
| 2182. |
Alcohols of low molecular weight are [CPMT 1976, 89; Pb. PMT 2000] |
| A. | Soluble in water |
| B. | Soluble in all solvents |
| C. | Insoluble in all solvents |
| D. | Soluble in water on heating |
| Answer» C. Insoluble in all solvents | |
| 2183. |
The alcohol which easily reacts with conc. HCl is [MP PMT 1985] |
| A. | \[C{{H}_{3}}-CHOH-C{{H}_{2}}-C{{H}_{3}}\] |
| B. | \[{{(C{{H}_{3}})}_{3}}-C-OH\] |
| C. | \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-OH\] |
| D. | \[{{(C{{H}_{3}})}_{3}}-CH-C{{H}_{2}}OH\] |
| Answer» C. \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-OH\] | |
| 2184. |
Which of the following compound will give positive iodoform test [MP PMT 1986, 99; SCRA 1991; CPMT 1994] |
| A. | \[C{{H}_{3}}OH\] |
| B. | \[\underset{\underset{C{{H}_{3}}}{\mathop{|}}\,}{\mathop{\overset{\overset{H}{\mathop{|}}\,}{\mathop{C{{H}_{3}}-C-OH}}\,}}\,\] |
| C. | \[\underset{\underset{C{{H}_{3}}}{\mathop{|}}\,}{\mathop{\overset{\overset{C{{H}_{3}}}{\mathop{|}}\,}{\mathop{C{{H}_{3}}-C-OH}}\,}}\,\] |
| D. | \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}OH\] |
| Answer» C. \[\underset{\underset{C{{H}_{3}}}{\mathop{|}}\,}{\mathop{\overset{\overset{C{{H}_{3}}}{\mathop{|}}\,}{\mathop{C{{H}_{3}}-C-OH}}\,}}\,\] | |
| 2185. |
When vapour of ethanol are passed over platinised asbestos in excess of air, the compound formed is [CPMT 1983] |
| A. | \[C{{H}_{3}}CHO\] |
| B. | \[C{{H}_{3}}COC{{H}_{3}}\] |
| C. | \[{{C}_{2}}{{H}_{2}}\] |
| D. | \[C{{H}_{3}}COOH\] |
| Answer» B. \[C{{H}_{3}}COC{{H}_{3}}\] | |
| 2186. |
Dehydration of ethanol gives [CPMT 1985; BHU 1989] |
| A. | Acetic acid |
| B. | Ethane |
| C. | Ethylene |
| D. | Acetylene |
| Answer» D. Acetylene | |
| 2187. |
Which compound has the highest boiling point [MP PET 2003] |
| A. | Acetone |
| B. | Diethyl ether |
| C. | Methanol |
| D. | Ethanol |
| Answer» E. | |
| 2188. |
Phenol is treated with bromine water and shaken well. The white precipitate formed during the process is [KCET (Med.) 2001; BIT 1992; AIIMS 1996; KCET 2001] |
| A. | m-bromophenol |
| B. | 2, 4-dibromophenol |
| C. | 2, 4, 6-tribromophenol |
| D. | A mixture of o- and p-bromophenols |
| Answer» D. A mixture of o- and p-bromophenols | |
| 2189. |
An alcohol on oxidation is found to give \[C{{H}_{3}}COOH\] and \[C{{H}_{3}}C{{H}_{2}}COOH.\] The structure of the alcohol is [BIT 1990] |
| A. | \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}OH\] |
| B. | \[{{(C{{H}_{3}})}_{2}}C(OH)C{{H}_{2}}C{{H}_{3}}\] |
| C. | \[C{{H}_{3}}C{{H}_{2}}CHOHC{{H}_{3}}\] |
| D. | \[C{{H}_{3}}CH(OH)C{{H}_{2}}C{{H}_{2}}C{{H}_{3}}\] |
| Answer» E. | |
| 2190. |
Which of the following gives ketone on oxidation [EAMCET 1987; BIT 1992] |
| A. | \[{{(C{{H}_{3}})}_{3}}COH\] |
| B. | \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}OH\] |
| C. | \[{{(C{{H}_{3}})}_{2}}CHC{{H}_{2}}OH\] |
| D. | \[C{{H}_{3}}CHOHC{{H}_{3}}\] |
| Answer» E. | |
| 2191. |
The \[-OH\] group of methyl alcohol cannot be replaced by chlorine by the action of [KCET 1989] |
| A. | Chlorine |
| B. | Hydrogen chloride |
| C. | Phosphorus trichloride |
| D. | Phosphorus pentachloride |
| Answer» B. Hydrogen chloride | |
| 2192. |
Which reagent is useful in converting 1-butanol to 1-bromobutane [EAMCET 1989] |
| A. | \[CHB{{r}_{3}}\] |
| B. | \[B{{r}_{2}}\] |
| C. | \[C{{H}_{3}}Br\] |
| D. | \[PB{{r}_{3}}\] |
| Answer» E. | |
| 2193. |
23 g of Na will react with methyl alcohol to give [NCERT 1972] |
| A. | One mole of oxygen |
| B. | One mole of \[{{H}_{2}}\] |
| C. | \[\frac{1}{2}\text{ mole of }{{H}_{2}}\] |
| D. | None of these |
| Answer» D. None of these | |
| 2194. |
Order of reactivity of alcohols towards sodium metal is [Pb. CET 1985] |
| A. | Pri > Sec > Ter |
| B. | Pri > Sec < Ter |
| C. | Pri < Sec > Ter |
| D. | Pri < Sec < Ter |
| Answer» B. Pri > Sec < Ter | |
| 2195. |
In reaction of alcohols with alkali metal, acid etc. which of the following alcohol will react fastest [BHU 1984] |
| A. | Secondary |
| B. | Tertiary |
| C. | Primary |
| D. | All equal |
| Answer» D. All equal | |
| 2196. |
Which of the following is not characteristic of alcohols [AFMC 1992] |
| A. | Lower alcohols are stronger and have bitter taste |
| B. | Higher alcohols are stronger and have bitter taste |
| C. | The boiling points of alcohols increase with increasing molecular mass |
| D. | The lower alcohols are soluble in water |
| Answer» C. The boiling points of alcohols increase with increasing molecular mass | |
| 2197. |
The increasing order of acidity among phenol, p-methylphenol, m-nitrophenol and p-nitrophenol is [CBSE PMT 1995; RPMT 2002] |
| A. | m-nitrophenol, p-nitrophenol, phenol, p-methylphenol |
| B. | p-methylphenol, m-nitrophenol, phenol, p-nitrophenol |
| C. | p-methylphenol, phenol, m-nitrophenol, p-nitrophenol |
| D. | Phenol, p-methylphenol, p-nitrophenol, m-nitrophenol |
| Answer» D. Phenol, p-methylphenol, p-nitrophenol, m-nitrophenol | |
| 2198. |
Compound A reacts with \[PC{{l}_{5}}\]to give B which on treatment with KCN followed by hydrolysis gave propionic acid. What is A and B respectively [EAMCET 1998] |
| A. | \[{{C}_{3}}{{H}_{8}}\] and \[{{C}_{3}}{{H}_{7}}Cl\] |
| B. | \[{{C}_{2}}{{H}_{6}}\] and \[{{C}_{2}}{{H}_{5}}Cl\] |
| C. | \[{{C}_{2}}{{H}_{5}}Cl\] and \[{{C}_{2}}{{H}_{5}}Cl\] |
| D. | \[{{C}_{2}}{{H}_{5}}OH\] and \[{{C}_{2}}{{H}_{5}}Cl\] |
| Answer» E. | |
| 2199. |
Which one of the following reactions does not yield an alkyl halide [EAMCET 1998] |
| A. | Diethyl ether \[+C{{l}_{2}}\] |
| B. | Diethyl ether \[+HI\] |
| C. | Diethyl ether and \[PC{{l}_{5}}\] |
| D. | Diethyl ether \[\xrightarrow{\text{Reduction}}X\xrightarrow{S{{O}_{2}}C{{l}_{2}}}\] |
| Answer» B. Diethyl ether \[+HI\] | |
| 2200. |
A compound X with molecular formula \[{{C}_{3}}{{H}_{8}}O\] can be oxidised to a compound Y with the molecular formula \[{{C}_{3}}{{H}_{6}}{{O}_{2}}\] X is most likely to be [MP PMT 1991] |
| A. | Primary alcohol |
| B. | Secondary alcohol |
| C. | Aldehyde |
| D. | Ketone |
| Answer» B. Secondary alcohol | |