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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.
| 2251. |
When phenyl magnesium bromide reacts with t-butanol, the product would be |
| A. | Benzene |
| B. | Phenol |
| C. | t-butyl benzene |
| D. | t-butyl ether |
| Answer» B. Phenol | |
| 2252. |
On heating glycerol with conc. \[{{H}_{2}}S{{O}_{4}},\] a compound is obtained which has a bad odour. The compound is [CPMT 1974; CBSE PMT 1994] |
| A. | Glycerol sulphate |
| B. | Acrolein |
| C. | Formic acid |
| D. | Allyl alcohol |
| Answer» C. Formic acid | |
| 2253. |
Which of the following react with benzoic acid to form ethyl benzoate [Pb. CET 2001] |
| A. | Ethyl alcohol |
| B. | Cinnamic acid |
| C. | Sodium ethoxide |
| D. | Ethyl chloride |
| Answer» B. Cinnamic acid | |
| 2254. |
Amongst the following, HBr reacts fastest with [IIT-JEE 1986; JIPMER 2000; DCE 2003] |
| A. | Propane-1-ol |
| B. | Propane-2-ol |
| C. | 2-methyl propane-1-ol |
| D. | 2-methyl propane-2-ol |
| Answer» E. | |
| 2255. |
Which of the following compound give yellow precipitate with \[{{I}_{2}}\] and NaOH [Pb. CET 2003] |
| A. | \[C{{H}_{3}}OH\] |
| B. | \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}OH\] |
| C. | \[{{C}_{2}}{{H}_{5}}O{{C}_{2}}{{H}_{5}}\] |
| D. | \[C{{H}_{3}}C{{H}_{2}}OH\] |
| Answer» E. | |
| 2256. |
With anhydrous zinc chloride, ethylene glycol gives [MP PMT 2004] |
| A. | Formaldehyde |
| B. | Acetylene |
| C. | Acetaldehyde |
| D. | Acetone |
| Answer» D. Acetone | |
| 2257. |
Which of the following reagents will produce salicyldehyde on reaction with phenol [DPMT 2004] |
| A. | \[CHC{{l}_{3}}/NaOH\] |
| B. | \[CC{{l}_{4}}/NaOH\] |
| C. | \[C{{H}_{2}}C{{l}_{2}}/NaOH\] |
| D. | \[C{{H}_{3}}Cl/NaOH\] |
| Answer» B. \[CC{{l}_{4}}/NaOH\] | |
| 2258. |
In Friedal-Crafts acylation, besides \[AlC{{l}_{3}}\], the other reactants are [DPMT 2004] |
| A. | |
| B. | |
| C. | |
| D. | |
| Answer» C. | |
| 2259. |
Which of the following will not form a yellow precipitate on heating with an alkaline solution of iodine [CBSE PMT 2004] |
| A. | \[C{{H}_{3}}OH\] |
| B. | \[C{{H}_{3}}C{{H}_{2}}OH\] |
| C. | \[C{{H}_{3}}CH(OH)C{{H}_{3}}\] |
| D. | \[C{{H}_{3}}C{{H}_{2}}CH(OH)C{{H}_{3}}\] |
| Answer» B. \[C{{H}_{3}}C{{H}_{2}}OH\] | |
| 2260. |
In the reaction \[\underset{C{{H}_{2}}OH}{\overset{C{{H}_{2}}OH}{\mathop{\underset{|}{\overset{|}{\mathop{C}}}\,HOH\,}}}\,+\underset{COOH}{\overset{COOH}{\mathop{|\ \ \ \ \ \ \ \ }}}\,\xrightarrow{110{}^\circ C}(A)\] product A will be [Pb . CET 2001] |
| A. | Glycerol monoformate |
| B. | Allyl alcohol |
| C. | Formaldehyde |
| D. | Acetic acid |
| Answer» B. Allyl alcohol | |
| 2261. |
The boiling point of methanol is greater than that of methyl thiol because [Kerala PMT 2004] |
| A. | There is intramolecular hydrogen bonding in methanol and intermolecular hydrogen bonding in methyl thiol |
| B. | There is intermolecular hydrogen bonding in methanol and no hydrogen bonding in methyl thiol |
| C. | There is no hydrogen bonding in methanol and intermolecular hydrogen bonding in methyl thiol |
| D. | There is intramolecular hydrogen bonding in methanol and no hydrogen bonding in methyl thiol |
| E. | There is no hydrogen bonding in methanol and intramolecular hydrogen bonding in methyl thiol |
| Answer» C. There is no hydrogen bonding in methanol and intermolecular hydrogen bonding in methyl thiol | |
| 2262. |
Which of the following explains the viscous nature of glycerol [JIPMER 1997] |
| A. | Covalent bonds |
| B. | Hydrogen bonds |
| C. | Vander Wall's forces |
| D. | Ionic forces |
| Answer» C. Vander Wall's forces | |
| 2263. |
Ethylene glycol reacts with excess of \[PC{{l}_{5}}\] to give [Kerala PMT 2004] |
| A. | 1, 1-dichloroethane |
| B. | 1, 2-dicholoroethane |
| C. | 1, 1, 1-trichloroethane |
| D. | 1, 1, 2, 2-tetrachloroethane |
| E. | 2, 2-dichloroethane |
| Answer» C. 1, 1, 1-trichloroethane | |
| 2264. |
A substance \[{{C}_{4}}{{H}_{10}}O\] yields on oxidation a compound \[{{C}_{4}}{{H}_{8}}O\] which gives an oxime and a positive iodoform test. The original substance on treatment with conc. \[{{H}_{2}}S{{O}_{4}}\] gives \[{{C}_{4}}{{H}_{8}}\]. The structure of the compound is [SCRA 2000] |
| A. | \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}C{{H}_{2}}OH\] |
| B. | \[C{{H}_{3}}CH(OH)C{{H}_{2}}C{{H}_{3}}\] |
| C. | \[{{(C{{H}_{3}})}_{3}}COH\] |
| D. | \[C{{H}_{3}}C{{H}_{2}}-O-C{{H}_{2}}C{{H}_{3}}\] |
| Answer» C. \[{{(C{{H}_{3}})}_{3}}COH\] | |
| 2265. |
The compound which does not react with sodium is [CBSE PMT 1994] |
| A. | \[{{C}_{2}}{{H}_{5}}OH\] |
| B. | \[C{{H}_{3}}-O-C{{H}_{3}}\] |
| C. | \[C{{H}_{3}}COOH\] |
| D. | \[C{{H}_{3}}-CHOH-C{{H}_{3}}\] |
| Answer» C. \[C{{H}_{3}}COOH\] | |
| 2266. |
Methyl-terbutyl ether on heating with HI of one molar concentration gives [MP PET 1997] |
| A. | \[C{{H}_{3}}I+{{(C{{H}_{3}})}_{3}}COH\] |
| B. | \[C{{H}_{3}}OH+{{(C{{H}_{3}})}_{3}}Cl\] |
| C. | \[C{{H}_{3}}I+{{(C{{H}_{3}})}_{3}}Cl\] |
| D. | None of the above |
| Answer» B. \[C{{H}_{3}}OH+{{(C{{H}_{3}})}_{3}}Cl\] | |
| 2267. |
When ether is reacted with \[{{O}_{2}},\] it undergoes explosion due to [CPMT 1996] |
| A. | Peroxide |
| B. | Acid |
| C. | Ketone |
| D. | TNT |
| Answer» B. Acid | |
| 2268. |
An ether is more volatile than an alcohol having the same molecular formula. This is due to [AIEEE 2003] |
| 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. | |
| 2269. |
Etherates are |
| A. | Ethers |
| B. | Solution in ether |
| C. | Complexes of ethers with Lewis acid |
| D. | Complexes of ethers with Lewis base |
| Answer» D. Complexes of ethers with Lewis base | |
| 2270. |
Acetyl chloride does not react with [MNR 1995] |
| A. | Diethyl ether |
| B. | Aniline |
| C. | Phenol |
| D. | Ethanol |
| Answer» B. Aniline | |
| 2271. |
The products formed in the following reaction \[{{C}_{6}}{{H}_{5}}-O-C{{H}_{3}}+HI\xrightarrow{\text{heat}}\] are [IIT 1995] |
| A. | \[{{C}_{6}}{{H}_{5}}-I\] and \[C{{H}_{3}}-OH\] |
| B. | \[{{C}_{6}}{{H}_{5}}-OH\] and \[C{{H}_{3}}-I\] |
| C. | \[{{C}_{6}}{{H}_{5}}-C{{H}_{3}}\] and HOI |
| D. | \[{{C}_{6}}{{H}_{6}}\] and \[C{{H}_{3}}OI\] |
| Answer» C. \[{{C}_{6}}{{H}_{5}}-C{{H}_{3}}\] and HOI | |
| 2272. |
Kolbe-Schmidt reaction is used for [CBSE PMT 1991] |
| A. | Salicylic acid |
| B. | Salicylaldehyde |
| C. | Phenol |
| D. | Hydrocarbon |
| Answer» B. Salicylaldehyde | |
| 2273. |
A compound X of formula \[{{C}_{3}}{{H}_{8}}O\]yields a compound \[{{C}_{3}}{{H}_{6}}O\], on oxidation. To which of the following classes of compounds could X being [Pb. PMT 2000] |
| A. | Secondary alcohol |
| B. | Alkene |
| C. | Aldehyde |
| D. | Tertiary alcohol |
| Answer» B. Alkene | |
| 2274. |
The ether that undergoes electrophilic substitution reactions is [JIPMER 2001] |
| A. | \[C{{H}_{3}}O{{C}_{2}}{{H}_{5}}\] |
| B. | \[{{C}_{6}}{{H}_{5}}OC{{H}_{3}}\] |
| C. | \[C{{H}_{3}}OC{{H}_{3}}\] |
| D. | \[{{C}_{2}}{{H}_{5}}O{{C}_{2}}{{H}_{5}}\] |
| Answer» C. \[C{{H}_{3}}OC{{H}_{3}}\] | |
| 2275. |
In which of the following reaction, phenol or sodium phenoxide is not formed [CPMT 1996] |
| A. | \[{{C}_{6}}{{H}_{5}}{{N}_{2}}Cl+alco.\,KOH\to \] |
| B. | \[{{C}_{6}}{{H}_{5}}OCl+NaOH\to \] |
| C. | \[{{C}_{6}}{{H}_{5}}{{N}_{2}}Cl+aq.\,NaOH\to \] |
| D. | \[{{C}_{6}}{{H}_{5}}NNCl\underset{\Delta }{\mathop{\xrightarrow{{{H}_{2}}O}}}\,\] |
| Answer» C. \[{{C}_{6}}{{H}_{5}}{{N}_{2}}Cl+aq.\,NaOH\to \] | |
| 2276. |
Dimethyl ether when heated with excess HI gives [CPMT 1996] |
| A. | \[C{{H}_{3}}I\] and \[C{{H}_{3}}OH\] |
| B. | \[C{{H}_{3}}I\] and \[{{H}_{2}}O\] |
| C. | \[{{C}_{2}}{{H}_{6}}+C{{H}_{3}}I\] and \[C{{H}_{3}}OH\] |
| D. | \[C{{H}_{3}}I\] and HCHO |
| Answer» C. \[{{C}_{2}}{{H}_{6}}+C{{H}_{3}}I\] and \[C{{H}_{3}}OH\] | |
| 2277. |
Addition of alcohols to aldehydes in presence of anhydrous acids yield [CET Pune 1998] |
| A. | Carboxylic acids |
| B. | Ethers |
| C. | Cyclic ethers |
| D. | Acetals |
| Answer» E. | |
| 2278. |
The ether When treated with HI produces [IIT-JEE 1999] |
| A. | |
| B. | |
| C. | |
| D. | |
| Answer» B. | |
| 2279. |
Ether is formed when ethyl alcohol is heated with conc. \[{{H}_{2}}S{{O}_{4}}.\] The conditions are [KCET 1984] |
| A. | Excess of \[{{H}_{2}}S{{O}_{4}}\] and \[{{170}^{o}}C\] |
| B. | Excess of \[{{C}_{2}}{{H}_{5}}OH\] and \[{{140}^{o}}C\] |
| C. | Excess of \[{{C}_{2}}{{H}_{5}}OH\] and \[{{180}^{o}}C\] |
| D. | Excess of conc. \[{{H}_{2}}S{{O}_{4}}\] and \[{{100}^{o}}C\] |
| Answer» C. Excess of \[{{C}_{2}}{{H}_{5}}OH\] and \[{{180}^{o}}C\] | |
| 2280. |
On boiling with concentrated hydrobromic acid, phenyl ethyl ether will yield [AIIMS 1992] |
| A. | Phenol and ethyl bromide |
| B. | Phenol and ethane |
| C. | Bromobenzene and ethanol |
| D. | Bromobenzene and ethane |
| Answer» B. Phenol and ethane | |
| 2281. |
Diethyl ether can be decomposed by heating with [CPMT 1980, 81, 89] |
| A. | HI |
| B. | NaOH |
| C. | Water |
| D. | \[KMn{{O}_{4}}\] |
| Answer» B. NaOH | |
| 2282. |
Diethyl ether absorbs oxygen to form [DPMT 1984] |
| A. | Red coloured sweet smelling compound |
| B. | Acetic acid |
| C. | Ether suboxide |
| D. | Ether peroxide |
| Answer» E. | |
| 2283. |
In the following reaction \[{{C}_{2}}{{H}_{5}}O{{C}_{2}}{{H}_{5}}+4[H]\xrightarrow{\text{Red P}+\text{HI}}2X+{{H}_{2}}O,\] X is [MP PMT 2002] |
| A. | Ethane |
| B. | Ethylene |
| C. | Butane |
| D. | Propane |
| Answer» B. Ethylene | |
| 2284. |
Glycerol was distilled with oxalic acid crystals and the products were led into Fehling solution and warmed. Cuprous oxide was precipitated. It is due to [KCET 1987] |
| A. | CO |
| B. | HCHO |
| C. | \[C{{H}_{3}}CHO\] |
| D. | HCOOH |
| Answer» E. | |
| 2285. |
Ether which is liquid at room temperature is [BVP 2002] |
| A. | \[{{C}_{2}}{{H}_{5}}OC{{H}_{3}}\] |
| B. | \[C{{H}_{3}}OC{{H}_{3}}\] |
| C. | \[{{C}_{2}}{{H}_{5}}O{{C}_{2}}{{H}_{5}}\] |
| D. | None of these |
| Answer» D. None of these | |
| 2286. |
When ether is exposed in air for sometime an explosive substance produced is [RPMT 2002] |
| A. | Peroxide |
| B. | TNT |
| C. | Oxide |
| D. | Superoxide |
| Answer» B. TNT | |
| 2287. |
Number of metamers represented by molecular formula \[{{C}_{4}}{{H}_{10}}O\] is [Tamil Nadu CET 2001] |
| A. | 4 |
| B. | 3 |
| C. | 2 |
| D. | 1 |
| Answer» C. 2 | |
| 2288. |
Which of the following is most acidic [CPMT 1999] |
| A. | Phenol |
| B. | Benzyl alcohol |
| C. | m-chlorophenol |
| D. | Cyclohexanol |
| Answer» D. Cyclohexanol | |
| 2289. |
The compound which will give negative iodoform test is [CPMT 1993, 99] |
| A. | \[C{{H}_{3}}CHO\] |
| B. | \[C{{H}_{3}}C{{H}_{2}}OH\] |
| C. | Isopropyl alcohol |
| D. | Benzyl alcohol |
| Answer» E. | |
| 2290. |
Alcohols combine with acetylene in the presence of mercury compounds as catalyst to form |
| A. | Acetals |
| B. | Xanthates |
| C. | Vinyl ethers |
| D. | None of the above |
| Answer» B. Xanthates | |
| 2291. |
When primary alcohol is oxidised with chlorine, it produces [AFMC 1999] |
| A. | \[HCHO\] |
| B. | \[C{{H}_{3}}CHO\] |
| C. | \[CC{{l}_{3}}CHO\] |
| D. | \[{{C}_{3}}{{H}_{7}}CHO\] |
| Answer» D. \[{{C}_{3}}{{H}_{7}}CHO\] | |
| 2292. |
At \[{{25}^{o}}C\] Ethylene glycol is a |
| A. | Solid compound |
| B. | Liquid |
| C. | Gas |
| D. | Brown solid |
| Answer» C. Gas | |
| 2293. |
Alcohols can be distinguished from alkenes by |
| A. | Dissolving in cold concentrated \[{{H}_{2}}S{{O}_{4}}\] |
| B. | Decolourizing with bromine in \[CC{{l}_{4}}\] |
| C. | Oxidizing with neutral permanganate solution |
| D. | None of the above |
| Answer» C. Oxidizing with neutral permanganate solution | |
| 2294. |
Final product formed on reduction of glycerol by hydroiodic acid is [CPMT 1987] |
| A. | Propane |
| B. | Propanoic acid |
| C. | Propene |
| D. | Propyne |
| Answer» D. Propyne | |
| 2295. |
Maximum solubility of alcohol in water is due to [MP PMT/ PET 1988; MP PMT 1989] |
| A. | Covalent bond |
| B. | Ionic bond |
| C. | H-bond with \[{{H}_{2}}O\] |
| D. | None of the above |
| Answer» D. None of the above | |
| 2296. |
In esterification of an acid, the other reagent is [CPMT 1988] |
| A. | Aldehyde |
| B. | Alcohol |
| C. | Amine |
| D. | Water |
| Answer» C. Amine | |
| 2297. |
Action of diazomethane on phenol liberates |
| A. | \[{{O}_{2}}\] |
| B. | \[{{H}_{2}}\] |
| C. | \[{{N}_{2}}\] |
| D. | \[C{{O}_{2}}\] |
| Answer» D. \[C{{O}_{2}}\] | |
| 2298. |
Alcohols react with Grignard reagent to form [DPMT 1986] |
| A. | Alkanes |
| B. | Alkenes |
| C. | Alkynes |
| D. | All of these |
| Answer» B. Alkenes | |
| 2299. |
When rectified spirit and benzene are distilled together, the first fraction obtained is |
| A. | A ternary azeotrope |
| B. | Absolute alcohol |
| C. | A binary azeotrope |
| D. | Denatured spirit |
| Answer» B. Absolute alcohol | |
| 2300. |
A migration of hydrogen with a pair of electrons is called |
| A. | Alkyl shift |
| B. | Hydride shift |
| C. | Hydrogen ion formation |
| D. | Dehydrogenation |
| Answer» C. Hydrogen ion formation | |