MCQOPTIONS
Saved Bookmarks
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.
| 2301. |
If ethanol dissolves in water, then which of the following would be done [MP PET 1989] |
| A. | Absorption of heat and contraction in volume |
| B. | Emission of heat and contraction in volume |
| C. | Absorption of heat and increase in volume |
| D. | Emission of heat and increase in volume |
| Answer» C. Absorption of heat and increase in volume | |
| 2302. |
Which of the following gives negative iodoform test |
| A. | \[C{{H}_{3}}C{{H}_{2}}OH\] |
| B. | \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}OH\] |
| C. | \[\underset{\underset{OH}{\mathop{|}}\,}{\mathop{{{C}_{6}}{{H}_{5}}-CH-C{{H}_{3}}}}\,\] |
| D. | \[\underset{\underset{OH}{\mathop{|}}\,}{\mathop{C{{H}_{3}}-CH-C{{H}_{3}}}}\,\] |
| Answer» C. \[\underset{\underset{OH}{\mathop{|}}\,}{\mathop{{{C}_{6}}{{H}_{5}}-CH-C{{H}_{3}}}}\,\] | |
| 2303. |
Which of the following is most soluble in water [MP PMT 1995] |
| A. | Normal butyl alcohol |
| B. | Isobutyl alcohol |
| C. | Tertiary butyl alcohol |
| D. | Secondary butyl alcohol |
| Answer» D. Secondary butyl alcohol | |
| 2304. |
When glycerine is added to a litre of water which of the following behaviour is observed [NCERT 1977; BHU 1979] |
| A. | Water evaporates more easily |
| B. | The temperature of water is increased |
| C. | The freezing point of water is lowered |
| D. | The viscosity of water is lowered |
| Answer» D. The viscosity of water is lowered | |
| 2305. |
In \[C{{H}_{3}}C{{H}_{2}}OH\] which bond dissociates heterolytically [IIT-JEE 1988; CPMT 1996] |
| A. | C ? C |
| B. | C ? O |
| C. | C ? H |
| D. | O ? H |
| Answer» E. | |
| 2306. |
The compound which gives the most stable carbonium ion on dehydration is [DCE 2000] |
| A. | \[C{{H}_{3}}-\underset{\underset{C{{H}_{3}}}{\mathop{|\,\,\,\,\,\,\,}}\,}{\mathop{CH}}\,-C{{H}_{2}}OH\] |
| B. | \[C{{H}_{3}}-\underset{\underset{C{{H}_{3}}}{\mathop{|}}\,}{\mathop{\overset{\overset{C{{H}_{3}}}{\mathop{|}}\,}{\mathop{C}}\,}}\,-OH\] |
| C. | \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}OH\] |
| D. | \[C{{H}_{3}}-\overset{\overset{C{{H}_{3}}}{\mathop{|\,\,\,\,\,\,}}\,}{\mathop{CH-}}\,C{{H}_{2}}-C{{H}_{3}}\] |
| Answer» C. \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}OH\] | |
| 2307. |
Methanol and ethanol are miscible in water due to [MP PET/PMT 1988; CPMT 1989; CBSE PMT 1991] |
| A. | Covalent character |
| B. | Hydrogen bonding character |
| C. | Oxygen bonding character |
| D. | None of these |
| Answer» C. Oxygen bonding character | |
| 2308. |
Phenol on distillation with zinc dust gives [MP PET 1991; CPMT 1997; MP PMT 1999, 2001; Pb. PMT 2000] |
| A. | \[{{C}_{6}}{{H}_{6}}\] |
| B. | \[{{C}_{6}}{{H}_{12}}\] |
| C. | \[{{C}_{6}}{{H}_{5}}O{{C}_{6}}{{H}_{5}}\] |
| D. | \[{{C}_{6}}{{H}_{5}}-{{C}_{6}}{{H}_{5}}\] |
| Answer» B. \[{{C}_{6}}{{H}_{12}}\] | |
| 2309. |
Picric acid is (at \[{{25}^{o}}C\]) |
| A. | A white solid |
| B. | A colourless liquid |
| C. | A gas |
| D. | A bright yellow solid |
| Answer» E. | |
| 2310. |
When ethyl alcohol reacts with acetic acid, the products formed are [CPMT 1989] |
| A. | Sodium ethoxide + hydrogen |
| B. | Ethyl acetate + water |
| C. | Ethyl acetate + soap |
| D. | Ethyl alcohol + water |
| Answer» C. Ethyl acetate + soap | |
| 2311. |
The process of manufacture of absolute alcohol from rectified spirit is [CPMT 1986, 87; Kurukshetra CEE 2002] |
| A. | Fractional distillation |
| B. | Steam distillation |
| C. | Azeotropic distillation |
| D. | Vacuum distillation |
| Answer» D. Vacuum distillation | |
| 2312. |
Dimethyl ether and ethyl alcohol are [CPMT 1986; Manipal MEE 1995] |
| A. | Branched isomer |
| B. | Position isomer |
| C. | Functional isomer |
| D. | Tautomer |
| Answer» D. Tautomer | |
| 2313. |
Glycerol heated with oxalic acid at \[{{110}^{o}}C\] to form [CPMT 1986, 90, 91, 97; JIPMER 1997] |
| A. | Formic acid |
| B. | Oxalic acid |
| C. | Allyl alcohol |
| D. | Glycerol trioxalate |
| Answer» B. Oxalic acid | |
| 2314. |
Glycerol reacts with \[{{P}_{4}}+{{I}_{2}}\] to form [CBSE PMT 1991] |
| A. | Aldehyde |
| B. | Allyl iodide |
| C. | Allyl alcohol |
| D. | Acetylene |
| Answer» C. Allyl alcohol | |
| 2315. |
Glycerol reacts with conc. \[HN{{O}_{3}}\] and conc. \[{{H}_{2}}S{{O}_{4}}\] to form [CPMT 1983; MP PMT/PET 1988] |
| A. | Glycerol mononitrate |
| B. | Glycerol dinitrate |
| C. | Glycerol trinitrate |
| D. | Acrolein |
| Answer» D. Acrolein | |
| 2316. |
The vapour pressure of aqueous solution of methanal is [UPSEAT 2000] |
| A. | Equal to water |
| B. | Equal to methanal |
| C. | More than water |
| D. | Less than water |
| Answer» D. Less than water | |
| 2317. |
TNT has the structure [UPSEAT 2000] |
| A. | |
| B. | |
| C. | |
| D. | |
| Answer» E. | |
| 2318. |
Methyl alcohol (methanol), ethyl alcohol (ethanol) and acetone (propanone) were treated with iodine and sodium hydroxide solutions. Which substances will give iodoform test |
| A. | Only ethyl alcohol |
| B. | Only methyl alcohol and ethyl alcohol |
| C. | Only ethyl alcohol and acetone |
| D. | Only acetone |
| Answer» D. Only acetone | |
| 2319. |
Which of the following vapours passed over heated copper to form acetone [BIT 1992] |
| A. | \[{{H}_{3}}C-C{{H}_{2}}-C{{H}_{2}}OH\] |
| B. | \[\underset{\underset{OH}{\mathop{|}}\,}{\mathop{C{{H}_{3}}-CH-C{{H}_{3}}}}\,\] |
| C. | \[\begin{matrix} C{{H}_{3}} & - & {} & {} & {} \\ C{{H}_{3}} & > & C & - & OH \\ C{{H}_{3}} & {} & {} & {} & {} \\ \end{matrix}\] |
| D. | \[C{{H}_{2}}=CH-C{{H}_{2}}OH\] |
| Answer» C. \[\begin{matrix} C{{H}_{3}} & - & {} & {} & {} \\ C{{H}_{3}} & > & C & - & OH \\ C{{H}_{3}} & {} & {} & {} & {} \\ \end{matrix}\] | |
| 2320. |
In presence of NaOH, phenol react with \[CHC{{l}_{3}}\] to form o-hydroxy benzaldehyde. This reaction is called [BIT 1992; MP PMT 1990, 2002; AIIMS 1992; MP PET 1994; JIPMER 1999] |
| A. | Riemer-Tiemann's reaction |
| B. | Sandmeyer's reaction |
| C. | Hoffmann's degradation reaction |
| D. | Gattermann's aldehyde synthesis |
| Answer» B. Sandmeyer's reaction | |
| 2321. |
One mole of phenol reacts with bromine to form tribromophenol. How much bromine is used [MP PMT 1989] |
| A. | 1. 5 mol |
| B. | 3 mol |
| C. | 4.5 mol |
| D. | 6 mol |
| Answer» C. 4.5 mol | |
| 2322. |
Phenol reacts with dilute \[HN{{O}_{3}}\] at normal temperature to form [MP PMT 1989] |
| A. | |
| B. | |
| C. | |
| D. | |
| Answer» C. | |
| 2323. |
Rate of substitution reaction in phenol is [MP PMT 1989] |
| A. | Slower than the rate of benzene |
| B. | Faster than the rate of benzene |
| C. | Equal to the rate of benzene |
| D. | None of these |
| Answer» C. Equal to the rate of benzene | |
| 2324. |
Conc. \[{{H}_{2}}S{{O}_{4}}\] heated with excess of \[{{C}_{2}}{{H}_{5}}OH\] at \[{{140}^{o}}C\] to form [MP PMT 1990; RPMT 2000; AFMC 2002] |
| A. | \[C{{H}_{3}}C{{H}_{2}}-O-C{{H}_{3}}\] |
| B. | \[C{{H}_{3}}C{{H}_{2}}-O-C{{H}_{2}}C{{H}_{3}}\] |
| C. | \[C{{H}_{3}}-O-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{3}}\] |
| D. | \[C{{H}_{2}}=C{{H}_{2}}\] |
| Answer» C. \[C{{H}_{3}}-O-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{3}}\] | |
| 2325. |
Diazo-coupling is useful to prepare some [CBSE PMT 1994] |
| A. | Pesticides |
| B. | Proteins |
| C. | Dyes |
| D. | Vitamins |
| Answer» D. Vitamins | |
| 2326. |
Alcohol which gives red colour with Victor Meyer test is [RPMT 2003] |
| A. | \[{{C}_{2}}{{H}_{5}}OH\] |
| B. | \[C{{H}_{3}}-\underset{OH\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{CH-C{{H}_{3}}}}\,}}\,\] |
| C. | \[C{{(C{{H}_{3}})}_{3}}OH\] |
| D. | None of these |
| Answer» B. \[C{{H}_{3}}-\underset{OH\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{CH-C{{H}_{3}}}}\,}}\,\] | |
| 2327. |
Phenol \[\underset{{{\text{H}}^{+}}}{\mathop{\xrightarrow{\text{CHCl}{{ & }_{\text{3}}}\text{/NaOH}}}}\,\]Salicyldehyde The above reaction is known as [Pb. PMT 2002] |
| A. | Riemer Tiemann reaction |
| B. | Bucherer reaction |
| C. | Gattermann synthesis |
| D. | Perkin reaction |
| Answer» B. Bucherer reaction | |
| 2328. |
A compound A on oxidation gave acetaldehyde, then again on oxidation gave acid. After first oxidation it was reacted with ammoniacal \[AgN{{O}_{3}}\] then silver mirror was produced. A is likely to be [DPMT 1996] |
| A. | Primary alcohol |
| B. | Tertiary alcohol |
| C. | Acetaldehyde |
| D. | Acetone |
| Answer» B. Tertiary alcohol | |
| 2329. |
In the esterification reaction of alcohols [Bihar CEE 1995] |
| A. | \[O{{H}^{-}}\] is replaced by \[C{{H}_{3}}COO\] group |
| B. | \[O{{H}^{-}}\] is replaced by chlorine |
| C. | \[{{H}^{-}}\] is replaced by sodium metal |
| D. | \[O{{H}^{-}}\]is replaced by \[{{C}_{2}}{{H}_{5}}OH\] |
| Answer» B. \[O{{H}^{-}}\] is replaced by chlorine | |
| 2330. |
A mixture of methanol vapours and air is passed over heated copper. The products are [KCET 1988] |
| A. | Carbon monoxide and hydrogen |
| B. | Formaldehyde and water vapour |
| C. | Formic acid and water vapour |
| D. | Carbon monoxide and water vapour |
| Answer» C. Formic acid and water vapour | |
| 2331. |
When ethyl alcohol \[({{C}_{2}}{{H}_{5}}OH)\] is mixed with ammonia and passed over heated alumina, the compound formed is [DPMT 1981; CBSE PMT 1989] |
| A. | \[{{C}_{2}}{{H}_{5}}N{{H}_{2}}\] |
| B. | \[{{C}_{2}}{{H}_{4}}\] |
| C. | \[{{C}_{2}}{{H}_{5}}O{{C}_{2}}{{H}_{5}}\] |
| D. | \[C{{H}_{3}}OC{{H}_{3}}\] |
| Answer» B. \[{{C}_{2}}{{H}_{4}}\] | |
| 2332. |
The alcohol which does not give a stable compound on dehydration is [MP PET 1997] |
| A. | Ethyl alcohol |
| B. | Methyl alcohol |
| C. | n-propyl alcohol |
| D. | n-butyl alcohol |
| Answer» C. n-propyl alcohol | |
| 2333. |
The order of melting point of ortho, para, meta-nitrophenol is [Orissa JEE 2003] |
| A. | o > m > p |
| B. | p > m > o |
| C. | m > p > o |
| D. | p > o > m |
| Answer» C. m > p > o | |
| 2334. |
In fermentation by zymase, alcohol and \[C{{O}_{2}}\] are obtained from the following sugar [MP PMT/PET 1988] |
| A. | Glucose |
| B. | Invert sugar |
| C. | Fructose |
| D. | All of these |
| Answer» B. Invert sugar | |
| 2335. |
Phenol reacts with \[CC{{l}_{4}}\] in presence of aqueous alkali and forms a product which on hydrolysis gives [MP PMT 1990] |
| A. | Salicylaldehyde |
| B. | Salicylic acid |
| C. | Benzaldehyde |
| D. | Benzoic acid |
| Answer» C. Benzaldehyde | |
| 2336. |
\[C{{H}_{3}}-O-{{C}_{3}}{{H}_{7}}\] and \[{{C}_{2}}{{H}_{5}}-O-{{C}_{2}}{{H}_{5}}\] exhibit which type of isomerism [MP PMT 1989] |
| A. | Metamerism |
| B. | Position |
| C. | Chain |
| D. | Functional |
| Answer» B. Position | |
| 2337. |
\[\text{Phenol }\underset{\text{Distillation}}{\mathop{\xrightarrow{Zn}}}\,A\underset{\text{Conc}\text{. }HN{{O}_{3}}}{\mathop{\xrightarrow{\text{Conc}\text{. }{{H}_{2}}S{{O}_{4}}}}}\,B\underset{NaOH}{\mathop{\xrightarrow{Zn}}}\,C\]In the above reaction A, B and C are the following compounds [MP PMT/PET 1988] |
| A. | \[{{C}_{6}}{{H}_{6}},{{C}_{6}}{{H}_{5}}N{{O}_{2}}\] and aniline |
| B. | \[{{C}_{6}}{{H}_{6}},\] dinitrobenzene and metanitroaniline |
| C. | Toluene, metanitrobenzene and metatoluedine |
| D. | \[{{C}_{6}}{{H}_{6}},\,{{C}_{6}}{{H}_{5}}N{{O}_{2}}\] and hydrazobenzene |
| Answer» E. | |
| 2338. |
Among the following, the compound that undergoes nitration readily is [NCERT 1984] |
| A. | Benzoic acid |
| B. | Toluene |
| C. | Phenol |
| D. | Nitrobenzene |
| Answer» C. Phenol | |
| 2339. |
Lucas test is used to distinguish between [MP PET 1994] |
| A. | \[{{1}^{o}},\,{{2}^{o}}\] and \[{{3}^{o}}\] alcohols |
| B. | \[{{1}^{o}},\,\,{{2}^{o}}\] and \[{{3}^{o}}\] amines |
| C. | Aldehydes and ketones |
| D. | Alkenes and alkynes |
| Answer» B. \[{{1}^{o}},\,\,{{2}^{o}}\] and \[{{3}^{o}}\] amines | |
| 2340. |
At room temperature the alcohol that do not reacts with Lucas reagent is |
| A. | Primary alcohol |
| B. | Secondary alcohol |
| C. | Tertiary alcohol |
| D. | All these three |
| Answer» B. Secondary alcohol | |
| 2341. |
Which of the following is not characteristic of alcohols [AIIMS 1980] |
| A. | They are lighter than water |
| B. | Their boiling points rise fairly uniformly with increasing molecular weight |
| C. | Lower members are insoluble in water and organic solvents but solubility regularly increases with molecular weight |
| D. | Lower members have pleasant smell and burning taste, while higher members are odorless and tasteless |
| Answer» D. Lower members have pleasant smell and burning taste, while higher members are odorless and tasteless | |
| 2342. |
The boiling point of ethyl alcohol should be less than that of [Pb. CET 1985] |
| A. | Propane |
| B. | Formic acid |
| C. | Dimethyl ether |
| D. | None of these |
| Answer» C. Dimethyl ether | |
| 2343. |
The compound with the highest boiling point is [MNR 1985] |
| A. | \[C{{H}_{4}}\] |
| B. | \[C{{H}_{3}}OH\] |
| C. | \[C{{H}_{3}}Cl\] |
| D. | \[C{{H}_{3}}Br\] |
| Answer» C. \[C{{H}_{3}}Cl\] | |
| 2344. |
The reaction between an alcohol and an acid with the elimination of water molecule is called [MH CET 1999] |
| A. | Esterification |
| B. | Saponification |
| C. | Etherification |
| D. | Elimination |
| Answer» B. Saponification | |
| 2345. |
Phenol is less acidic than [IIT-JEE 1986; UPSEAT 2003; Orissa JEE 2004] |
| A. | Acetic acid |
| B. | p-nitrophenol |
| C. | Both a and b |
| D. | None of these |
| Answer» D. None of these | |
| 2346. |
The mixture of ethanol and water cannot be separated by distillation because [KCET 1984] |
| A. | They form a constant boiling mixture |
| B. | Alcohol molecules are solvated |
| C. | Their boiling points are very near |
| D. | Alcohol remains dissolved in water |
| Answer» B. Alcohol molecules are solvated | |
| 2347. |
Ethyl alcohol exhibits acidic character on reacting with [MP PMT 1995] |
| A. | Acetic acid |
| B. | Sodium metal |
| C. | Hydrogen iodide |
| D. | Acidic potassium dichromate |
| Answer» C. Hydrogen iodide | |
| 2348. |
What amount of bromine will be required to convert 2 g of phenol into 2, 4, 6-tribromophenol [MP PET/PMT 1998] |
| A. | 4.00 |
| B. | 6.00 |
| C. | 10.22 |
| D. | 20.44 |
| Answer» D. 20.44 | |
| 2349. |
Which one of the following compounds gives a positive iodoform test [MP PMT 1997] |
| A. | Pentanal |
| B. | 1-phenyl ethanol |
| C. | 2-phenyl ethanol |
| D. | 3-pentanol |
| Answer» C. 2-phenyl ethanol | |
| 2350. |
The reagent used for the dehydration of an alcohol is [MP PET/PMT 1998] |
| A. | Phosphorus pentachloride |
| B. | Calcium chloride |
| C. | Aluminium oxide |
| D. | Sodium chloride |
| Answer» D. Sodium chloride | |