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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.
| 2401. |
Benzaldehyde can be prepared by oxidation of toluene by [BHU 1986] |
| A. | Acidic \[KMn{{O}_{4}}\] |
| B. | \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] |
| C. | \[Cr{{O}_{2}}C{{l}_{2}}\] |
| D. | All of these |
| Answer» D. All of these | |
| 2402. |
Methyl ethyl ketone is prepared by the oxidation of [IIT-JEE 1987; MP PMT 1992] |
| A. | 2-propanol |
| B. | 1-butanol |
| C. | 2-butanol |
| D. | t-butyl alcohol |
| Answer» D. t-butyl alcohol | |
| 2403. |
The Clemmenson reduction of acetone yields |
| A. | Ethanol |
| B. | Ethanal |
| C. | Propane |
| D. | Propanol |
| Answer» D. Propanol | |
| 2404. |
Catalyst \[SnC{{l}_{2}}/HCl\] is used in [BHU 1995] |
| A. | Stephen's reduction |
| B. | Cannizzaro reaction |
| C. | Clemmensen's reduction |
| D. | Rosenmund's reduction |
| Answer» B. Cannizzaro reaction | |
| 2405. |
In the Rosenmund's reduction, \[BaS{{O}_{4}}\] taken with catalyst Pd acts as |
| A. | Promotor |
| B. | Catalytic poison |
| C. | Cooperator |
| D. | Absorber |
| Answer» C. Cooperator | |
| 2406. |
In the following reaction, product P is \[R-\overset{O\,\,\,}{\mathop{\overset{||\,\,\,\,}{\mathop{C-}}\,}}\,Cl\] \[\underset{Pd-BaS{{O}_{4}}}{\mathop{\xrightarrow{{{H}_{2}}}}}\,P\] [CBSE PMT 1991, 2000, 02; Kerala CET 2001; IIT 1992; AIIMS 1997; AFMC 1998] |
| A. | \[RC{{H}_{2}}OH\] |
| B. | \[R\,COOH\] |
| C. | \[RCHO\] |
| D. | \[RC{{H}_{3}}\] |
| Answer» D. \[RC{{H}_{3}}\] | |
| 2407. |
Which of the following compound gives a ketone with Grignard reagent [CPMT 1988; MP PET 1997] |
| A. | Formaldehyde |
| B. | Ethyl alcohol |
| C. | Methyl cyanide |
| D. | Methyl iodide |
| Answer» D. Methyl iodide | |
| 2408. |
On heating calcium acetate and calcium formate, the product formed is [DPMT 1984; EAMCET 1985; MP PMT 1996, 92; KCET 1990; CPMT 1979, 82, 84; BIT 1992; RPET 2000] |
| A. | \[C{{H}_{3}}COC{{H}_{3}}\] |
| B. | \[C{{H}_{3}}CHO\] |
| C. | \[HCHO+CaC{{O}_{3}}\] |
| D. | \[C{{H}_{3}}CHO+CaC{{O}_{3}}\] |
| Answer» E. | |
| 2409. |
Acetophenone is prepared by the reaction of which of the following in the presence of \[AlC{{l}_{3}}\] catalyst [AIIMS 1996] |
| A. | Phenol and acetic acid |
| B. | Benzene and acetone |
| C. | Benzene and acetyl chloride |
| D. | Phenol and acetone |
| Answer» D. Phenol and acetone | |
| 2410. |
Identify the product C in the series \[C{{H}_{3}}CN\xrightarrow{Na/{{C}_{2}}{{H}_{5}}OH}A\xrightarrow{HN{{O}_{2}}}B\xrightarrow{\text{Tollen }\!\!'\!\!\text{ s reagent}}C\] [MP PET 1999] |
| A. | \[C{{H}_{3}}COOH\] |
| B. | \[C{{H}_{3}}C{{H}_{2}}NHOH\] |
| C. | \[C{{H}_{3}}CON{{H}_{2}}\] |
| D. | \[C{{H}_{3}}CHO\] |
| Answer» E. | |
| 2411. |
Dry heating of calcium acetate gives [DPMT 1979, 81, 96; NCERT 1981; KCET 1993; Bihar CEE 1995; MNR 1986; MP PMT 1997; MP PET 1993, 95; JIPMER 2002; AIIMS 1996; CPMT 1982, 86, 96, 2003; RPMT 2002] |
| A. | Acetaldehyde |
| B. | Ethane |
| C. | Acetic acid |
| D. | Acetone |
| Answer» E. | |
| 2412. |
\[C{{H}_{3}}-C{{H}_{2}}-C\equiv CH\underset{{{H}_{2}}O}{\mathop{\xrightarrow{R}}}\,\]Butanone, R is [BHU 2003] |
| A. | \[H{{g}^{++}}\] |
| B. | \[KMn{{O}_{4}}\] |
| C. | \[KCl{{O}_{3}}\] |
| D. | \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] |
| Answer» B. \[KMn{{O}_{4}}\] | |
| 2413. |
Catalyst used in Rosenmund reduction is [Bihar MEE 1997] |
| A. | Pd / \[BaS{{O}_{4}}\] |
| B. | Zn-Hg couple |
| C. | \[LiAl{{H}_{4}}\] |
| D. | \[Ni/{{H}_{2}}\] |
| Answer» E. | |
| 2414. |
From which of the following tertiary butyl alcohol is obtained by the action of methyl magnesium iodide [MP CET 2000] |
| A. | \[HCHO\] |
| B. | \[C{{H}_{3}}CHO\] |
| C. | \[C{{H}_{3}}COC{{H}_{3}}\] |
| D. | \[C{{O}_{2}}\] |
| Answer» D. \[C{{O}_{2}}\] | |
| 2415. |
The oxidation of toluene to benzaldehyde by chromyl chloride is called [CBSE PMT 1996; AFMC 1998, 99; AIIMS 2000; JIPMER 2001; AFMC 2001; DCE 2004] |
| A. | Cannizzaro reaction |
| B. | Wurtz reaction |
| C. | Etard reaction |
| D. | Reimer-Tiemann reaction |
| Answer» D. Reimer-Tiemann reaction | |
| 2416. |
Reduction of nitroalkanes yields |
| A. | Acid |
| B. | Alcohol |
| C. | Amine |
| D. | Diazo compounds |
| Answer» D. Diazo compounds | |
| 2417. |
Aniline is usually purified by [CPMT 1983, 93; JIPMER 1997] |
| A. | Steam distillation |
| B. | Simple distillation |
| C. | Vacuum distillation |
| D. | Extraction with a solvent |
| Answer» B. Simple distillation | |
| 2418. |
Ethylamine can be obtained by the [CPMT 1985] |
| A. | Action of \[N{{H}_{3}}\] on ethyl iodide |
| B. | Action of \[N{{H}_{3}}\] on ethyl alcohol |
| C. | Both A and B |
| D. | None of the above |
| Answer» D. None of the above | |
| 2419. |
Ethylamine can be prepared by the action of bromine and caustic potash on [CPMT 1994] |
| A. | Acetamide |
| B. | Propionamide |
| C. | Formamide |
| D. | Methyl cyanide |
| Answer» C. Formamide | |
| 2420. |
\[KCN\] reacts readily to give a cyanide with [J & K 2005] |
| A. | Ethyl alcohol |
| B. | Ethyl bromide |
| C. | Bromobenzene |
| D. | Chlorobenzene |
| Answer» C. Bromobenzene | |
| 2421. |
For the preparation of p-nitroiodobenzene from p-nitroaniline, the best method is [Orissa JEE 2005] |
| A. | \[NaN{{O}_{2}}/HCl\] followed by \[KI\]. |
| B. | \[NaN{{O}_{2}}/HCl\] followed by \[CuCN\] |
| C. | \[LiAl{{H}_{4}}\] followed by \[{{I}_{2}}\] |
| D. | \[NaB{{H}_{4}}\] followed by \[{{I}_{2}}\] |
| Answer» B. \[NaN{{O}_{2}}/HCl\] followed by \[CuCN\] | |
| 2422. |
Gabriel's phthalimide synthesis is used for the preparation of [CPMT 1982; DPMT 1983] |
| A. | Primary aromatic amine |
| B. | Secondary amine |
| C. | Primary aliphatic amine |
| D. | Tertiary amine |
| Answer» D. Tertiary amine | |
| 2423. |
Azo-dyes are prepared from : [BHU 2004; Pb. CET 2001] |
| A. | Aniline |
| B. | Salicylic acid |
| C. | Benzaldehyde |
| D. | Chlorobenzene |
| Answer» B. Salicylic acid | |
| 2424. |
An organic amino compound reacts with aqueous nitrous acid at low temperature to produce an oily nitroso amine. The compound is : [DCE 2003] |
| A. | \[C{{H}_{3}}N{{H}_{2}}\] |
| B. | \[C{{H}_{3}}C{{H}_{2}}N{{H}_{2}}\] |
| C. | \[C{{H}_{3}}C{{H}_{2}}NH.C{{H}_{2}}C{{H}_{3}}\] |
| D. | \[{{(C{{H}_{3}}C{{H}_{2}})}_{3}}\] |
| Answer» D. \[{{(C{{H}_{3}}C{{H}_{2}})}_{3}}\] | |
| 2425. |
Aromatic nitriles (ArCN) are not prepared by reaction [AIIMS 2004] |
| A. | ArX + KCN |
| B. | \[ArN_{2}^{+}+CuCN\] |
| C. | \[ArCON{{H}_{2}}+{{P}_{2}}{{O}_{5}}\] |
| D. | \[ArCON{{H}_{2}}+SOC{{l}_{ 2}}\] |
| Answer» B. \[ArN_{2}^{+}+CuCN\] | |
| 2426. |
\[C{{H}_{3}}CN\xrightarrow{Na+{{C}_{2}}{{H}_{5}}OH}X\] The compound X is [MP PMT 1983; BHU 1984] |
| A. | \[C{{H}_{3}}CON{{H}_{2}}\] |
| B. | \[C{{H}_{3}}C{{H}_{2}}N{{H}_{2}}\] |
| C. | \[{{C}_{2}}{{H}_{6}}\] |
| D. | \[C{{H}_{3}}NHC{{H}_{3}}\] |
| Answer» C. \[{{C}_{2}}{{H}_{6}}\] | |
| 2427. |
In the series of reaction \[{{C}_{6}}{{H}_{5}}N{{H}_{2}}\underset{0-5{}^\circ C}{\mathop{\xrightarrow{NaN{{O}_{2}}/HCl}}}\,X\underset{C{{H}_{2}}O}{\mathop{\xrightarrow{HN{{O}_{2}}}}}\,Y+{{N}_{2}}+HCl\] X and Y are respectively [EAMCET 2003] |
| A. | \[{{C}_{6}}{{H}_{5}}-N=N-{{C}_{6}}{{H}_{5}}\,,\,{{C}_{6}}{{H}_{5}}N_{2}^{\oplus }C{{l}^{\Theta }}\] |
| B. | \[{{C}_{6}}{{H}_{5}}N_{2}^{\oplus }C{{l}^{\Theta }},\,{{C}_{6}}{{H}_{5}}-N=N-{{C}_{6}}{{H}_{5}}\] |
| C. | \[{{C}_{6}}{{H}_{5}}N_{2}^{\oplus }C{{l}^{\Theta }},\,{{C}_{6}}{{H}_{5}}N{{O}_{2}}\] |
| D. | \[{{C}_{6}}{{H}_{5}}N{{O}_{2}},\,{{C}_{6}}{{H}_{6}}\] |
| Answer» D. \[{{C}_{6}}{{H}_{5}}N{{O}_{2}},\,{{C}_{6}}{{H}_{6}}\] | |
| 2428. |
\[C{{H}_{3}}N{{O}_{2}}\xrightarrow{Sn+HCl}C{{H}_{3}}X,\] the ?X? contain [CPMT 2003] |
| A. | \[-N{{H}_{2}}\] |
| B. | \[-\,COOH\] |
| C. | \[-\,CHO\] |
| D. | \[{{(C{{H}_{3}}CO)}_{2}}O\] |
| Answer» B. \[-\,COOH\] | |
| 2429. |
In acid medium nitrobenzene is reduced to aniline as shown in the reaction \[{{C}_{6}}{{H}_{5}}-N{{O}_{2}}+6[H]\to {{C}_{6}}{{H}_{5}}-N{{H}_{2}}+2{{H}_{2}}O\]The reducing agent used in this reaction is ??. [Orissa JEE 2002] |
| A. | \[LiAl{{H}_{4}}\] |
| B. | \[Sn/HCl\] |
| C. | Na/alcohol |
| D. | \[{{H}_{2}}/Ni\] |
| Answer» C. Na/alcohol | |
| 2430. |
The diazonium salts are the reaction products in presence of excess of mineral acid with nitrous acid and [MP PET 2002] |
| A. | Primary aliphatic amine |
| B. | Secondary aromatic amine |
| C. | Primary aromatic amine |
| D. | Tertiary aliphatic amine |
| Answer» D. Tertiary aliphatic amine | |
| 2431. |
In this reaction \[{{C}_{6}}{{H}_{5}}N{{H}_{2}}+HCl+NaN{{O}_{2}}\to X\]. Product X is [RPMT 2002; AFMC 2002] |
| A. | Aniline hydrochloride |
| B. | Nitro aniline |
| C. | Benzenediazonium chloride |
| D. | None of these |
| Answer» D. None of these | |
| 2432. |
The rate determining step for the preparation of nitrobenzene from benzene is [AIIMS 2001] |
| A. | Removal of \[\overset{+\,\,\,\,\,\,}{\mathop{N{{O}_{2}}}}\,\] |
| B. | Removal of \[\overset{+\,\,\,\,\,\,}{\mathop{N{{O}_{3}}}}\,\] |
| C. | Formation of \[\overset{+\,\,\,\,\,\,}{\mathop{N{{O}_{2}}}}\,\] |
| D. | Formation of \[\overset{+\,\,\,\,\,\,}{\mathop{N{{O}_{3}}}}\,\] |
| Answer» D. Formation of \[\overset{+\,\,\,\,\,\,}{\mathop{N{{O}_{3}}}}\,\] | |
| 2433. |
Which of the following reacts with \[NaN{{O}_{2}}+HCl\] to give phenol [MP PMT 2000] |
| A. | \[{{C}_{6}}{{H}_{5}}C{{H}_{2}}NHC{{H}_{3}}\] |
| B. | \[{{(C{{H}_{3}})}_{2}}NH\] |
| C. | \[C{{H}_{3}}N{{H}_{2}}\] |
| D. | \[{{C}_{6}}{{H}_{5}}N{{H}_{2}}\] |
| Answer» E. | |
| 2434. |
Nitrobenzene can be prepared from benzene by using a mixture of conc.\[HN{{O}_{3}}\] and conc.\[{{H}_{2}}S{{O}_{4}}\]. In the nitrating mixture, \[HN{{O}_{3}}\] acts as a [BHU 2001] |
| A. | Base |
| B. | Acid |
| C. | Catalyst |
| D. | Reducing agent |
| Answer» C. Catalyst | |
| 2435. |
When chlorobenzene is treated with \[N{{H}_{3}}\] in presence of \[C{{u}_{2}}O\] in xylene at 570 K. The product obtained is [Pb. PMT 2000] |
| A. | Benzylamine |
| B. | Diazonium salt |
| C. | Schiff?s base |
| D. | Aniline |
| Answer» E. | |
| 2436. |
Which of the following reactions give \[RCON{{H}_{2}}\] [Roorkee 2000] |
| A. | \[R-C\equiv N+{{H}_{2}}O\xrightarrow{HCl}\] |
| B. | \[RCOON{{H}_{4}}\xrightarrow{\,\,\,\,\,\text{heat}\,\,\,\,\,\,\,\,\,\,\,\,}\] |
| C. | \[R-COCl+N{{H}_{3}}\xrightarrow{\,\,\,\,\,\,\,\,\,\,\,}\] |
| D. | \[{{(RCO)}_{2}}O+N{{H}_{3}}\xrightarrow{\,\,\,\,\,\,\,\,\,\,\,\,}\] |
| Answer» C. \[R-COCl+N{{H}_{3}}\xrightarrow{\,\,\,\,\,\,\,\,\,\,\,}\] | |
| 2437. |
The amine formed from an amide by means of bromine and alkali has |
| A. | Same number of C atoms as that of amide |
| B. | One less C atom than that of amide |
| C. | One more C atom than that of amide |
| D. | Two more C atoms than that of amide |
| Answer» C. One more C atom than that of amide | |
| 2438. |
Ethyl amine on heating with \[C{{S}_{2}}\] in presence of \[HgC{{l}_{2}}\] forms [MP PET 2000] |
| A. | \[{{C}_{2}}{{H}_{5}}NCS\] |
| B. | \[{{({{C}_{2}}{{H}_{5}})}_{2}}S\] |
| C. | \[{{({{C}_{2}}{{H}_{5}})}_{2}}CS\] |
| D. | \[{{C}_{2}}{{H}_{5}}{{(CS)}_{2}}\] |
| Answer» B. \[{{({{C}_{2}}{{H}_{5}})}_{2}}S\] | |
| 2439. |
The product is [RPET 2000] |
| A. | |
| B. | |
| C. | |
| D. | |
| Answer» C. | |
| 2440. |
Nitrobenzene combines with hydrogen in the presence of platinum to produce [BHU 1999] |
| A. | Toluene |
| B. | Benzene |
| C. | Aniline |
| D. | Azobenzene |
| Answer» D. Azobenzene | |
| 2441. |
Which of the following compound is the strongest base [BHU 1999] |
| A. | Ammonia |
| B. | Aniline |
| C. | Methylamine |
| D. | N-methyl aniline |
| Answer» D. N-methyl aniline | |
| 2442. |
Aromatic primary amine when treated with cold \[HN{{O}_{2}}\] gives [Pb. CET 2002; DCE 1999] |
| A. | Benzyl alcohol |
| B. | Nitro benzene |
| C. | Benzene |
| D. | Diazonium salt |
| Answer» E. | |
| 2443. |
Which of the following reacts with chloroform and a base to form phenyl isocyanide [AFMC 1997] |
| A. | Aniline |
| B. | Phenol |
| C. | Benzene |
| D. | Nitrobenzene |
| Answer» B. Phenol | |
| 2444. |
\[C{{H}_{3}}CON{{H}_{2}}\xrightarrow{Na+ROH}Z+{{H}_{2}}O.\] What is Z ? [CPMT 1996] |
| A. | \[C{{H}_{3}}C{{H}_{2}}N{{H}_{2}}\] |
| B. | \[C{{H}_{3}}C{{H}_{2}}NC\] |
| C. | \[C{{H}_{3}}C{{H}_{2}}C{{H}_{3}}\] |
| D. | \[N{{H}_{2}}CON{{H}_{2}}\] |
| Answer» B. \[C{{H}_{3}}C{{H}_{2}}NC\] | |
| 2445. |
The reaction \[{{C}_{6}}{{H}_{5}}N{{H}_{2}}+CHC{{l}_{3}}+3KOH\to {{C}_{6}}{{H}_{5}}NC+3KCl+2{{H}_{2}}O\] is known as [BHU 1996] |
| A. | Carbylamine reaction |
| B. | Reimer-Tiemann reaction |
| C. | Kolbe reaction |
| D. | Hofmann's degradation |
| Answer» B. Reimer-Tiemann reaction | |
| 2446. |
Carbylamine reaction is given by [BHU 1996; EAMCET 1990] |
| A. | \[{{1}^{o}}\] amine |
| B. | \[{{3}^{o}}\] amine |
| C. | \[{{2}^{o}}\] amine |
| D. | Quarternary salts |
| Answer» C. \[{{2}^{o}}\] amine | |
| 2447. |
Acetamide is treated separately with the following reagents. Which would give methyl amine [IIT 1983; CPMT 1988, 94; MP PET 1993; MP PMT 1996; AIIMS 1998] |
| A. | \[PC{{l}_{5}}\] |
| B. | \[NaOH+B{{r}_{2}}\] |
| C. | Sodalime |
| D. | Hot conc. \[{{H}_{2}}S{{O}_{4}}\] |
| Answer» C. Sodalime | |
| 2448. |
Which of the following reactions will not give primary amine [CPMT 1999] |
| A. | \[C{{H}_{3}}CON{{H}_{2}}\xrightarrow{KOH.B{{r}_{2}}}\] |
| B. | \[C{{H}_{3}}CN\xrightarrow{LiAl{{H}_{4}}}\] |
| C. | \[C{{H}_{3}}NC\xrightarrow{LiAl{{H}_{4}}}\] |
| D. | \[C{{H}_{3}}CON{{H}_{2}}\xrightarrow{LiAl{{H}_{4}}}\] |
| Answer» D. \[C{{H}_{3}}CON{{H}_{2}}\xrightarrow{LiAl{{H}_{4}}}\] | |
| 2449. |
In the following reaction, X is \[X\xrightarrow{\text{Bromination}}Y\xrightarrow{NaN{{O}_{2}}+HCl}Z\underset{{{C}_{2}}{{H}_{5}}OH}{\mathop{\xrightarrow{\text{Boiling}}}}\,\text{Tribromobenzene}\] [CPMT 1999] |
| A. | Benzoic acid |
| B. | Salicylic acid |
| C. | Phenol |
| D. | Aniline |
| Answer» E. | |
| 2450. |
In the reaction \[C{{H}_{3}}COOH\xrightarrow{PC{{l}_{5}}}(A)\xrightarrow{N{{H}_{3}}}(B)\xrightarrow{NaBrO}(C).\] the final product C is |
| A. | Ammonium acetate |
| B. | Acetamide |
| C. | Amino methane |
| D. | Ethanal |
| Answer» D. Ethanal | |