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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.
| 2451. |
Starting from propanoic acid, the following reactions were carried out \[\text{Propanoic acid }\xrightarrow{SOC{{l}_{2}}}X\xrightarrow{N{{H}_{3}}}Y\xrightarrow{B{{r}_{2}}+KOH}Z\] What is the compound Z |
| A. | \[C{{H}_{3}}-C{{H}_{2}}-Br\] |
| B. | \[C{{H}_{3}}-C{{H}_{2}}-N{{H}_{2}}\] |
| C. | |
| D. | \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-N{{H}_{2}}\] |
| Answer» C. | |
| 2452. |
When aniline reacts with \[NaN{{O}_{2}}\] and dil. HCl at \[{{0}^{o}}-{{5}^{o}}C,\] the product formed is [MP PMT 1996; AIIMS 1996] |
| A. | Nitroaniline |
| B. | Benzene diazonium chloride |
| C. | Benzene |
| D. | Trinitroaniline |
| Answer» C. Benzene | |
| 2453. |
Which of the following gives RNC, when reacted with \[CHC{{l}_{3}}\] and KOH [MP PET 1996] |
| A. | \[RN{{H}_{2}}\] |
| B. | \[{{R}_{2}}NH\] |
| C. | \[{{R}_{3}}N\] |
| D. | \[{{R}_{4}}{{N}^{+}}C{{l}^{-}}\] |
| Answer» B. \[{{R}_{2}}NH\] | |
| 2454. |
Which of the following is converted into an alcohol on treatment with \[HN{{O}_{2}}\] [MP PET 1996; MP PMT 1999] |
| A. | Methyl amine |
| B. | Aniline |
| C. | Dimethyl amine |
| D. | Triethyl amine |
| Answer» B. Aniline | |
| 2455. |
Which of the following gives primary amine on reduction [MP PMT 1995] |
| A. | \[C{{H}_{3}}-C{{H}_{2}}-\overset{O}{\mathop{\overset{||}{\mathop{N}}\,}}\,\to O\] |
| B. | \[C{{H}_{3}}-C{{H}_{2}}-O-N=O\] |
| C. | \[C{{H}_{3}}C{{H}_{2}}N{{O}_{3}}\] |
| D. | None of these |
| Answer» B. \[C{{H}_{3}}-C{{H}_{2}}-O-N=O\] | |
| 2456. |
Identify 'B' in the reaction Acetamide \[\underset{\Delta }{\mathop{\xrightarrow{{{P}_{2}}{{O}_{5}}}}}\,A\xrightarrow{4H}B\] [MP PET 1995] |
| A. | \[C{{H}_{3}}N{{H}_{2}}\] |
| B. | \[C{{H}_{3}}C{{H}_{2}}N{{H}_{2}}\] |
| C. | \[C{{H}_{3}}CN\] |
| D. | \[C{{H}_{3}}COON{{H}_{4}}\] |
| Answer» C. \[C{{H}_{3}}CN\] | |
| 2457. |
Reaction \[C{{H}_{3}}CON{{H}_{2}}\xrightarrow{NaOBr}\] gives [CPMT 1983, 93, 97] |
| A. | \[C{{H}_{3}}Br\] |
| B. | \[C{{H}_{4}}\] |
| C. | \[C{{H}_{3}}COBr\] |
| D. | \[C{{H}_{3}}N{{H}_{2}}\] |
| Answer» E. | |
| 2458. |
When ethanol is mixed with ammonia and passed over alumina the compound formed is [CBSE PMT 1990] |
| 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. \[{{C}_{2}}{{H}_{4}}\] | |
| 2459. |
In the reaction \[R-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-OH\xleftarrow{{{H}_{3}}{{O}^{+}}}X\xrightarrow{[H]}RC{{H}_{2}}N{{H}_{2}};\] 'X' is [MP PMT 1990] |
| A. | Isonitrile |
| B. | Nitrile |
| C. | Nitrite |
| D. | Oxime |
| Answer» C. Nitrite | |
| 2460. |
Which one of the following compound gives a secondary amine on reduction |
| A. | Nitromethane |
| B. | Nitrobenzene |
| C. | Methyl isocyanide |
| D. | Methyl cyanide |
| Answer» D. Methyl cyanide | |
| 2461. |
The Hinsberg's method is used for |
| A. | Preparation of primary amines |
| B. | Preparation of secondary amines |
| C. | Preparation of tertiary amines |
| D. | Separation of amine mixtures |
| Answer» E. | |
| 2462. |
Nitrosobenzene can be prepared by oxidizing aniline from |
| A. | \[{{H}_{2}}S{{O}_{4}}\] |
| B. | \[{{H}_{2}}S{{O}_{5}}\] |
| C. | \[{{H}_{2}}S{{O}_{3}}\] |
| D. | \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] |
| Answer» C. \[{{H}_{2}}S{{O}_{3}}\] | |
| 2463. |
Reduction of nitroalkanes in neutral medium (e.g. Zn / \[N{{H}_{4}}Cl\]) forms mainly |
| A. | \[R-N{{H}_{2}}\] |
| B. | \[R-NHOH\] |
| C. | \[R-N=N-Cl\] |
| D. | All of these |
| Answer» C. \[R-N=N-Cl\] | |
| 2464. |
Acetamide changes into methylamine by |
| A. | Hofmann bromamide reaction |
| B. | Hofmann reaction |
| C. | Friedel-Craft's reaction |
| D. | Hinsberg reaction |
| Answer» B. Hofmann reaction | |
| 2465. |
When methyl iodide is heated with ammonia, the product obtained is |
| A. | Methylamine |
| B. | Dimethylamine |
| C. | Trimethylamine |
| D. | A mixture of the above three amines |
| Answer» E. | |
| 2466. |
Amides may be converted into amines by reaction named after [CPMT 1974; MP PET 1992; CBSE PMT 1999] |
| A. | Perkin |
| B. | Claisen |
| C. | Hoffmann |
| D. | Kolbe |
| Answer» D. Kolbe | |
| 2467. |
When ethyl alcohol\[({{C}_{2}}{{H}_{5}}OH)\]reacts with thionyl chloride, in the presence of pyridine, the product obtained is [AIIMS; CBSE PMT 2001] |
| A. | \[C{{H}_{3}}C{{H}_{2}}Cl+HCl\] |
| B. | \[{{C}_{2}}{{H}_{5}}Cl+HCl+S{{O}_{2}}\] |
| C. | \[C{{H}_{3}}C{{H}_{2}}Cl+{{H}_{2}}O+S{{O}_{2}}\] |
| D. | \[C{{H}_{3}}C{{H}_{2}}Cl+HCl+S{{O}_{2}}\] |
| Answer» E. | |
| 2468. |
Preparation of alkyl halides in laboratory is least preferred by [DPMT 2000] |
| A. | Treatment of alcohols |
| B. | Addition of hydrogen halides to alkenes |
| C. | Halide exchange |
| D. | Direct halogenation of alkanes |
| Answer» E. | |
| 2469. |
To get DDT, chlorobenzene has to react with which of the following compounds in the presence of concentrated sulphuric acid [KCET (Engg/Med.) 2001] |
| A. | Trichloroethane |
| B. | Dichloroacetone |
| C. | Dichloroacetaldehyde |
| D. | Trichloroacetaldehyde |
| Answer» E. | |
| 2470. |
Which compound needs chloral in its synthesis [Pb. PET 2003] |
| A. | D. D. T. |
| B. | Gammexane |
| C. | Chloroform |
| D. | Michler?s Ketone |
| Answer» B. Gammexane | |
| 2471. |
DDT is prepared by reacting chlorobenzene with [BHU 1998, 2005] |
| A. | \[CC{{l}_{4}}\] |
| B. | \[CC{{l}_{3}}-CHO\] |
| C. | \[CHC{{l}_{3}}\] |
| D. | Ethane |
| Answer» C. \[CHC{{l}_{3}}\] | |
| 2472. |
Silver acetate\[+\ B{{r}_{2}}\xrightarrow{\text{C}{{\text{S}}_{\text{2}}}}\]. The main product of this reaction is [Kurukshetra CET 2002] |
| A. | \[C{{H}_{3}}-Br\] |
| B. | \[C{{H}_{3}}COI\] |
| C. | \[C{{H}_{3}}COOH\] |
| D. | None of these |
| Answer» B. \[C{{H}_{3}}COI\] | |
| 2473. |
Best method of preparing alkyl chloride is [MH CET 2004] |
| A. | \[ROH+SOC{{l}_{2}}\xrightarrow{\ \ \ \ \ \ \ \ \ }\] |
| B. | \[ROH+PC{{l}_{5}}\xrightarrow{\ \ \ \ \ \ \ \ \ \ \ \ }\] |
| C. | \[ROH+PC{{l}_{3}}\xrightarrow{\ \ \ \ \ \ \ \ \ \ \ \ }\] |
| D. | \[ROH+HCl\xrightarrow{\text{anhy}\text{. }ZnC{{l}_{2}}}\] |
| Answer» B. \[ROH+PC{{l}_{5}}\xrightarrow{\ \ \ \ \ \ \ \ \ \ \ \ }\] | |
| 2474. |
Ethylene reacts with bromine to form [Pb. CET 2000] |
| A. | Chloroethane |
| B. | Ethylene dibromide |
| C. | Cyclohexane |
| D. | 1-bromo propane |
| Answer» C. Cyclohexane | |
| 2475. |
The product formed on reaction of ethyl alcohol with bleaching powder is [Orissa JEE 2004; DPMT 1978; AIIMS 1991] |
| A. | \[CHC{{l}_{3}}\] |
| B. | \[CC{{l}_{3}}CHO\] |
| C. | \[C{{H}_{3}}COC{{H}_{3}}\] |
| D. | \[C{{H}_{3}}CHO\] |
| Answer» B. \[CC{{l}_{3}}CHO\] | |
| 2476. |
Acetone is mixed with bleaching powder to give [AFMC 2004] |
| A. | Chloroform |
| B. | Acetaldehyde |
| C. | Ethanol |
| D. | Phosgene |
| Answer» B. Acetaldehyde | |
| 2477. |
The compound formed on heating chlorobenzene with chloral in the presence of concentrated sulphuric acid, is [AIEEE 2004] |
| A. | Freon |
| B. | DDT |
| C. | Gammexene |
| D. | Hexachloroethane |
| Answer» C. Gammexene | |
| 2478. |
Propene on treatment with HBr gives [CPMT 1986] |
| A. | Isopropyl bromide |
| B. | Propyl bromide |
| C. | 1, 2-dibromoethane |
| D. | None of the above |
| Answer» B. Propyl bromide | |
| 2479. |
Which of the following acids adds to propene in the presence of peroxide to give anti-Markownikoff?s product [MP PET 2003] |
| A. | \[HF\] |
| B. | \[HCl\] |
| C. | \[HBr\] |
| D. | \[HI\] |
| Answer» D. \[HI\] | |
| 2480. |
When chlorine is passed through warm benzene in presence of the sunlight, the product obtained is [KCET 2003] |
| A. | Benzotrichloride |
| B. | Chlorobenzene |
| C. | Gammexane |
| D. | DDT |
| Answer» D. DDT | |
| 2481. |
On treatment with chlorine in presence of sunlight, toluene giv.es the product [Orissa JEE 2003; MH CET 1999, 2002] |
| A. | o-chloro toluene |
| B. | 2, 5-dichloro toluene |
| C. | p-chloro toluene |
| D. | Benzyl chloride |
| Answer» E. | |
| 2482. |
In the above process product A is [Kerala (Engg.) 2002] |
| A. | Fluorobenzene |
| B. | Benzene |
| C. | 1, 4-difluorobenzene |
| D. | 1, 3-difluorobenzene |
| Answer» B. Benzene | |
| 2483. |
Which reagent cannot be used to prepare an alkyl halide from an alcohol [CPMT 1989, 94] |
| A. | \[HCl+ZnC{{l}_{2}}\] |
| B. | NaCl |
| C. | \[PC{{l}_{5}}\] |
| D. | \[SOC{{l}_{3}}\] |
| Answer» C. \[PC{{l}_{5}}\] | |
| 2484. |
When a solution of sodium chloride containing ethyl alcohol is electrolysed, it forms |
| A. | Ethyl alcohol |
| B. | Chloral |
| C. | Chloroform |
| D. | Acetaldehyde |
| Answer» D. Acetaldehyde | |
| 2485. |
A Grignard's reagent may be made by reacting magnesium with [CPMT 1973, 83, 84] |
| A. | Methyl amine |
| B. | Diethyl ether |
| C. | Ethyl iodide |
| D. | Ethyl alcohol |
| Answer» D. Ethyl alcohol | |
| 2486. |
The starting substance for the preparation of \[C{{H}_{3}}I\] is [CPMT 1975] |
| A. | \[C{{H}_{3}}OH\] |
| B. | \[{{C}_{2}}{{H}_{5}}OH\] |
| C. | \[C{{H}_{3}}CHO\] |
| D. | \[{{(C{{H}_{3}})}_{2}}CO\] |
| Answer» B. \[{{C}_{2}}{{H}_{5}}OH\] | |
| 2487. |
\[{{C}_{6}}{{H}_{5}}Cl\] prepared by aniline with [IIT-JEE 1984] |
| A. | HCl |
| B. | \[C{{u}_{2}}C{{l}_{2}}\] |
| C. | \[C{{l}_{2}}\] in presence of anhydrous \[AlC{{l}_{3}}\] |
| D. | \[HN{{O}_{2}}\] and then heated with \[C{{u}_{2}}C{{l}_{2}}\] |
| Answer» E. | |
| 2488. |
Ethanol is converted into ethyl chloride by reacting with [MP PET 1991; MP PMT 1990; BHU 1997] |
| A. | \[C{{l}_{2}}\] |
| B. | \[SOC{{l}_{2}}\] |
| C. | HCl |
| D. | NaCl |
| Answer» C. HCl | |
| 2489. |
Which compound gives yellow ppt. with iodine and alkali [IIT-JEE 1984] |
| A. | 2-hydroxy propane |
| B. | Acetophenone |
| C. | Methyl acetone |
| D. | Acetamide |
| Answer» C. Methyl acetone | |
| 2490. |
Halogenation of alkanes is [KCET 2002] |
| A. | A reductive process |
| B. | An oxidative process |
| C. | An isothermal process |
| D. | An indothermal process |
| Answer» C. An isothermal process | |
| 2491. |
Which compound does not form iodoform with alkali and iodine [IIT-JEE 1985] |
| A. | Acetone |
| B. | Ethanol |
| C. | Diethyl ketone |
| D. | Isopropyl alcohol |
| Answer» D. Isopropyl alcohol | |
| 2492. |
On heating diethyl ether with conc. HI, 2 moles of which of the following is formed [IIT-JEE 1983; MP PET 1990; EAMCET 1990; AFMC 1993; JIPMER 2001] |
| A. | Ethanol |
| B. | Iodoform |
| C. | Ethyl iodide |
| D. | Methyl iodide |
| Answer» D. Methyl iodide | |
| 2493. |
Chlorine reacts with ethanol to give [MP PMT 1989; CPMT 1997; KCET 1998; JIPMER 1999] |
| A. | Ethyl chloride |
| B. | Chloroform |
| C. | Acetaldehyde |
| D. | Chloral |
| Answer» E. | |
| 2494. |
Chloroform can be obtained from [MNR 1986] |
| A. | Methanol |
| B. | Methanal |
| C. | Propanol-1 |
| D. | Propanol-2 |
| Answer» E. | |
| 2495. |
Which of the following is obtained when chloral is boiled with NaOH [CBSE PMT 1991; RPMT 1999] |
| A. | \[C{{H}_{3}}Cl\] |
| B. | \[CHC{{l}_{3}}\] |
| C. | \[CC{{l}_{4}}\] |
| D. | None of these |
| Answer» C. \[CC{{l}_{4}}\] | |
| 2496. |
In preparation of \[CHC{{l}_{3}}\] from ethanol and bleaching powder, the latter provides [BHU 1986] |
| A. | \[Ca{{(OH)}_{2}}\] |
| B. | \[C{{l}_{2}}\] |
| C. | Both A and B |
| D. | None of these |
| Answer» D. None of these | |
| 2497. |
What is the main product of the reaction between 2-methyl propene with HBr [RPMT 2002] |
| A. | 1-bromo butane |
| B. | 1-bromo-2 methyl propane |
| C. | 2-bromo butane |
| D. | 2-bromo-2 methyl propane |
| Answer» E. | |
| 2498. |
When ethyl alcohol and KI reacted in presence of \[N{{a}_{2}}C{{O}_{3}},\] yellow crystals of...... are formed [AFMC 1989] |
| A. | \[CH{{I}_{3}}\] |
| B. | \[C{{H}_{3}}I\] |
| C. | \[C{{H}_{2}}{{I}_{2}}\] |
| D. | \[{{C}_{2}}{{H}_{5}}I\] |
| Answer» B. \[C{{H}_{3}}I\] | |
| 2499. |
Benzene reacts with chlorine to form benzene hexachloride in presence of [MP PET 1999] |
| A. | Nickel |
| B. | \[AlC{{l}_{3}}\] |
| C. | Bright sunlight |
| D. | Zinc |
| Answer» D. Zinc | |
| 2500. |
\[{{C}_{6}}{{H}_{6}}+C{{l}_{2}}\xrightarrow{UV\text{ Light}}\] Product. In above reaction product is [CPMT 1997] |
| A. | \[CC{{l}_{3}}CHO\] |
| B. | \[{{C}_{6}}{{H}_{6}}C{{l}_{6}}\] |
| C. | \[{{C}_{6}}{{H}_{12}}C{{l}_{6}}\] |
| D. | \[{{C}_{6}}{{H}_{9}}C{{l}_{2}}\] |
| Answer» C. \[{{C}_{6}}{{H}_{12}}C{{l}_{6}}\] | |