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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.
| 10601. |
Which of the following is currently used as a tyre cord [Kerala (Med.) 2003] |
| A. | Terelene |
| B. | Polyethylene |
| C. | Polypropylene |
| D. | Nylon ? 6 |
| Answer» E. | |
| 10602. |
?Starch? consists of two fractions; one is \[\alpha -\text{amylose}\] and the other is |
| A. | Amylopectin |
| B. | Glycogen |
| C. | Pecticamide |
| D. | Alginic acid |
| Answer» B. Glycogen | |
| 10603. |
An organic compound of analysis gave c = 48 g H = 8 g and N = 56 g. Volume of 1.0 g of the compound was found to be 200 ml at NTP. Molecular formula of the compound is |
| A. | \[{{C}_{4}}{{H}_{8}}{{N}_{4}}\] |
| B. | \[{{C}_{2}}{{H}_{4}}{{N}_{2}}\] |
| C. | \[{{C}_{12}}{{H}_{24}}{{N}_{12}}\] |
| D. | \[{{C}_{16}}{{H}_{32}}{{N}_{16}}\] |
| Answer» B. \[{{C}_{2}}{{H}_{4}}{{N}_{2}}\] | |
| 10604. |
Assign number 1 for least to 4 for most to indicate the relative base strength of the following:(I) \[{{C}_{6}}{{H}_{5}}N{{H}_{2}}\] (II) \[p-N{{O}_{2}}{{C}_{6}}{{H}_{4}}N{{H}_{2}}\](III) \[m-N{{O}_{2}}{{C}_{6}}{{H}_{4}}N{{H}_{2}}\](IV) \[p-C{{H}_{3}}O{{C}_{6}}{{H}_{4}}N{{H}_{2}}\] |
| A. | I - 3 II - 1 III - 2 IV - 4 |
| B. | I - 1 II - 2 III - 3 IV - 4 |
| C. | I - 2 II - 3 III - 4 IV - 1 |
| D. | I - 4 II - 1 III - 3 IV - 2 |
| Answer» B. I - 1 II - 2 III - 3 IV - 4 | |
| 10605. |
Zone refining is based on the principle that.......... |
| A. | impurities of low boiling metals can be separated distillation |
| B. | impurities are more soluble in molten metal than in solid metal |
| C. | different components of a mixture are differently adsorbed on an adsorbent. |
| D. | vapour of volatile compound can be decomposed in pure metal. |
| Answer» C. different components of a mixture are differently adsorbed on an adsorbent. | |
| 10606. |
The IUPAC name for \[C{{H}_{3}}CH=CHC{{H}_{2}}\underset{N{{H}_{2}}\,\,\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{CHC{{H}_{2}}}}\,}}\,COOH\] is [CBSE PMT 1995] |
| A. | 5-aminohex-2-ene carboxylic acid |
| B. | 5-amino-2-heptenoic acid |
| C. | 3-amino-5-heptenoic acid |
| D. | \[\beta -\] amino-\[\delta -\]heptenoic acid |
| Answer» D. \[\beta -\] amino-\[\delta -\]heptenoic acid | |
| 10607. |
IUPAC name of the compound \[C{{H}_{3}}-C{{H}_{2}}-\overset{C{{H}_{3}}}{\mathop{\overset{|\,\,\,\,}{\mathop{CH}}\,}}\,-C{{H}_{2}}-\underset{\underset{\underset{\overset{\underset{\begin{matrix} C{{H}_{3}} & C{{H}_{3}}\,\,\, \\ \end{matrix}}{\mathop{\hat{\ }}}\,}{\mathop{{}}}\,}{\mathop{CH\,\,\,\,\,\,\,\,}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}}\,}{\mathop{CH\,\,\,-\,\,C{{H}_{2}}-C{{H}_{2}}C{{H}_{3}}}}\,\] [Orissa JEE 2003] |
| A. | 4-isopropyl 1-6-methyl octane |
| B. | 3- methyl-5-(1?-methylethyl) octane |
| C. | 3-methyl-5-isopropyl octane |
| D. | 6-methyl-4-(1?methylethyl) octane |
| Answer» C. 3-methyl-5-isopropyl octane | |
| 10608. |
An organic compound on analysis gave the following results : C = 54.5%, O = 36.4%, H = 9.1%. The Empirical formula of the compound is [CPMT 1977; KCET 1998; MP PET 2003; UPSEAT 2004; IIT-JEE (Screening) 2004] |
| A. | \[C{{H}_{3}}O\] |
| B. | \[{{C}_{2}}{{H}_{4}}O\] |
| C. | \[{{C}_{3}}{{H}_{4}}O\] |
| D. | \[{{C}_{4}}{{H}_{8}}O\] |
| Answer» C. \[{{C}_{3}}{{H}_{4}}O\] | |
| 10609. |
Carbylamines test is used in the detection of [DCE 1999] |
| A. | Aliphatic 2o amine |
| B. | Aromatic 1o amine |
| C. | Aliphatic 1o amine |
| D. | Both aliphatic and aromatic 1o amines |
| Answer» E. | |
| 10610. |
A nauseating smell in the carbylamine test for primary amines is due to the formation of [MP PET 1993] |
| A. | Isocyanide |
| B. | Chloroform |
| C. | Cyanide |
| D. | DDT |
| Answer» B. Chloroform | |
| 10611. |
Introduction of a methyl group in ammonia markedly increases the basic strength of ammonia in aq. solution, introduction of the second methyl group increases only marginally the basic, strength of methyl amine in water. This is due to |
| A. | different type of hybridisation in the two amines, |
| B. | protonated dimethyl amine is more solvated than methyl amine. |
| C. | protonated dimethyl amine is more solvated than the protonated methyl amine. |
| D. | protonated dimethyl amine is less stable than the protonated methyl amine. |
| Answer» E. | |
| 10612. |
Which of the following can undergo electrophilic substitution when treated with nitrous acid at \[0{}^\circ C\]? |
| A. | \[{{C}_{6}}{{H}_{5}}N{{H}_{2}}\] |
| B. | \[{{C}_{6}}{{H}_{5}}NHC{{H}_{2}}\] |
| C. | \[{{C}_{6}}{{H}_{5}}N{{(C{{H}_{3}})}_{2}}\] |
| D. | None |
| Answer» D. None | |
| 10613. |
The correct order of basicities of the following compounds is(1)(2)\[C{{H}_{3}}-C{{H}_{2}}-N{{H}_{2}}\](3)\[{{(C{{H}_{3}})}_{2}}NH\](4)\[C{{H}_{3}}-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-N{{H}_{2}}\] |
| A. | 2>1>3>4 |
| B. | 1>3>2>4 |
| C. | 3>1>2>4 |
| D. | 1>2>3>4 |
| Answer» C. 3>1>2>4 | |
| 10614. |
Identify the prdouct C in the series \[C{{H}_{3}}CN\xrightarrow{Na/{{C}_{2}}{{H}_{5}}OH}A\xrightarrow{HN{{\text{O}}_{2}}}B\] \[\xrightarrow{Cu/573K}C\] |
| A. | \[C{{H}_{3}}COOH\] |
| B. | \[C{{H}_{2}}C{{H}_{2}}NHOH\] |
| C. | \[C{{H}_{3}}CON{{H}_{2}}\] |
| D. | \[C{{H}_{3}}CHO\] |
| Answer» E. | |
| 10615. |
An organic compound [A] on reduction gives compound [B]. [B] on treatment with \[CHC{{l}_{3}}\] and alcoholic KOH gives [C]. [C] on catalytic reduction gives N-methylaniline. The compound A is |
| A. | Methylamine |
| B. | Nitromethane |
| C. | Aniline |
| D. | Nitrobenzene |
| Answer» E. | |
| 10616. |
Which of the following compounds gives dye test? |
| A. | Aniline |
| B. | Methylamine |
| C. | Diphenylamine |
| D. | Ethylamine |
| Answer» B. Methylamine | |
| 10617. |
The order of basicity of amines in gaseous state is: |
| A. | \[1{}^\circ >2{}^\circ >3{}^\circ >N{{H}_{3}}\] |
| B. | \[3{}^\circ >2{}^\circ >N{{H}_{3}}>1{}^\circ \] |
| C. | \[3{}^\circ >2{}^\circ >1{}^\circ >N{{H}_{3}}\] |
| D. | \[N{{H}_{3}}>1{}^\circ >2{}^\circ >3{}^\circ \] |
| Answer» D. \[N{{H}_{3}}>1{}^\circ >2{}^\circ >3{}^\circ \] | |
| 10618. |
\[{{C}_{7}}{{H}_{9}}N\] has how many isomeric forms that contain a benzene ring? |
| A. | 4 |
| B. | 5 |
| C. | 6 |
| D. | 7 |
| Answer» C. 6 | |
| 10619. |
Towards electrophilic substitution, the most reactive will be |
| A. | Nitrobenzene |
| B. | Aniline |
| C. | Aniline hydrochloride |
| D. | N-Acetylaniline |
| Answer» C. Aniline hydrochloride | |
| 10620. |
Which of the following chemicals are used to manufacture methyl isocyanate that caused ?Bhopal Tragedy? (i) Methylamine (ii) Phosgene (iii) Phosphine (iv) Dimethylamine [AIIMS 2005] |
| A. | (i) and (iii) |
| B. | (iii) and (iv) |
| C. | (i) and (ii) |
| D. | (ii) and (iv) |
| Answer» D. (ii) and (iv) | |
| 10621. |
Reaction of aniline with benzaldehyde is [RPMT 2002] |
| A. | Polymerisation |
| B. | Condensation |
| C. | Addition |
| D. | Substitution |
| Answer» C. Addition | |
| 10622. |
Alkyl cyanides when react with Grignard reagent, the product on hydrolysis found, is [MP PMT 1980] |
| A. | Aldehyde |
| B. | Ketone |
| C. | Alcohol |
| D. | Acid |
| Answer» C. Alcohol | |
| 10623. |
A mixture of benzene and aniline can be separated by [KCET (Engg.) 2001] |
| A. | Hot water |
| B. | dil. HCl |
| C. | dil. NaOH |
| D. | Alcohol |
| Answer» C. dil. NaOH | |
| 10624. |
In presence of acid, hydrolysis of methyl cyanide gives [MP PET/PMT 1998] |
| A. | Acetic acid |
| B. | Methylamine |
| C. | Methyl alcohol |
| D. | Formic acid |
| Answer» B. Methylamine | |
| 10625. |
Nitro group in nitrobenzene is a [MNR 1986] |
| A. | Ortho director |
| B. | Meta director |
| C. | Para director |
| D. | Ortho and para director |
| Answer» C. Para director | |
| 10626. |
Nitrobenzene at room temperature is |
| A. | Gas |
| B. | Liquid |
| C. | Solid |
| D. | Solution |
| Answer» C. Solid | |
| 10627. |
Mark the correct statement [CPMT 1974; DPMT 1983; MP PMT 1994] |
| A. | Methyl amine is slightly acidic |
| B. | Methyl amine is less basic than \[N{{H}_{3}}\] |
| C. | Methyl amine is stronger base than \[N{{H}_{3}}\] |
| D. | Methyl amine forms salts with alkalies |
| Answer» D. Methyl amine forms salts with alkalies | |
| 10628. |
On heating acetamide in presence of \[{{P}_{2}}{{O}_{5}},\] which of the following is formed [MP PMT 1992; MP PET 1994; Kurukshetra CEE 1998] |
| A. | Ammonium acetate |
| B. | Acetonitrile |
| C. | \[N{{H}_{3}}\] |
| D. | Methylamines |
| Answer» C. \[N{{H}_{3}}\] | |
| 10629. |
Reduction of alkyl nitrites yields |
| A. | Alcohol |
| B. | Base |
| C. | Amine |
| D. | Acid |
| Answer» B. Base | |
| 10630. |
When acetamide reacts with \[B{{r}_{2}}\] and caustic soda, then we get : [CPMT 2004] |
| A. | Acetic acid |
| B. | Bromoacetic acid |
| C. | Methyl amine |
| D. | Ethyl amine |
| Answer» D. Ethyl amine | |
| 10631. |
Which of the following does not reduce Tollen?s reagent [Kerala PMT 2004] |
| A. | \[C{{H}_{3}}CHO\] |
| B. | \[{{C}_{6}}{{H}_{5}}NHOH\] |
| C. | \[HCOOH\] |
| D. | \[{{C}_{6}}{{H}_{5}}N{{O}_{2}}\] |
| Answer» E. | |
| 10632. |
\[{{C}_{6}}{{H}_{5}}N{{H}_{2}}\xrightarrow{NaN{{O}_{2}}HCl}X\xrightarrow{C{{u}_{2}}{{(CN)}_{2}}}Y\xrightarrow{{{H}_{2}}O/{{H}^{+}}}Z\] Z is identified as : [Pb. PMT 2004] |
| A. | \[{{C}_{6}}{{H}_{5}}-NH-C{{H}_{3}}\] |
| B. | \[{{C}_{6}}{{H}_{5}}-COOH\] |
| C. | \[{{C}_{6}}{{H}_{5}}-C{{H}_{2}}-N{{H}_{2}}\] |
| D. | \[{{C}_{6}}{{H}_{5}}-C{{H}_{2}}-COOH\] |
| Answer» C. \[{{C}_{6}}{{H}_{5}}-C{{H}_{2}}-N{{H}_{2}}\] | |
| 10633. |
Which one doesn't liberate \[N{{H}_{3}}\] when undergoes hydrolysis [Orissa JEE 2005] |
| A. | Acetanilide |
| B. | Acetonitrile |
| C. | Acetamide |
| D. | Phenyl isocyanide |
| Answer» E. | |
| 10634. |
The correct order of basicity of amines in water is : [Pb. CET 2003] |
| A. | \[{{(C{{H}_{3}})}_{2}}NH>{{(C{{H}_{3}})}_{3}}N>C{{H}_{3}}N{{H}_{2}}\] |
| B. | \[C{{H}_{3}}N{{H}_{2}}>{{(C{{H}_{3}})}_{2}}NH>{{(C{{H}_{3}})}_{3}}N\] |
| C. | \[{{(C{{H}_{3}})}_{3}}N>{{(C{{H}_{3}})}_{2}}NH>C{{H}_{3}}N{{H}_{2}}\] |
| D. | \[{{(C{{H}_{3}})}_{3}}N>C{{H}_{3}}N{{H}_{2}}>{{(C{{H}_{3}})}_{2}}NH\] |
| Answer» B. \[C{{H}_{3}}N{{H}_{2}}>{{(C{{H}_{3}})}_{2}}NH>{{(C{{H}_{3}})}_{3}}N\] | |
| 10635. |
The correct order of reactivity towards the electrophilic substitution of the compounds aniline (I) benzene (II) and nitrobenzene (III) is [CBSE PMT 2003] |
| A. | I > II > III |
| B. | III > II > I |
| C. | II > III > I |
| D. | I < II > III |
| Answer» B. III > II > I | |
| 10636. |
Ethyl amine on acetylation gives [BHU 2002; BVP 2003] |
| A. | N-ethyl acetamide |
| B. | Acetamide |
| C. | Methyl acetamide |
| D. | None |
| Answer» B. Acetamide | |
| 10637. |
Ethyl amine undergoes oxidation in the presence of \[KMn{{O}_{4}}\] to form [CPMT 1985] |
| A. | An acid |
| B. | An alcohol |
| C. | An aldehyde |
| D. | A nitrogen oxide |
| Answer» D. A nitrogen oxide | |
| 10638. |
Which of the following is capable of forming a zwitter ion [JIPMER 2002] |
| A. | \[{{C}_{6}}{{H}_{5}}-OH\] |
| B. | \[{{C}_{6}}{{H}_{4}}{{(N{{H}_{2}})}_{2}}\] |
| C. | \[\underset{C{{H}_{2}}OH\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{2}}OH}}\,}}\,\] |
| D. | \[{{H}_{2}}N-C{{H}_{2}}-COOH\] |
| Answer» E. | |
| 10639. |
When aniline is treated with sodium nitrite and hydrochloric acid at 0oC, it gives [Orissa JEE 2003] |
| A. | Phenol and \[{{N}_{2}}\] |
| B. | Diazonium salt |
| C. | Hydrazo compound |
| D. | No reaction takes place |
| Answer» C. Hydrazo compound | |
| 10640. |
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 | |
| 10641. |
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. \[{{({{C}_{2}}{{H}_{5}})}_{2}}S\] | |
| 10642. |
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 | |
| 10643. |
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 | |
| 10644. |
Which of the following reactions does not yield an amine [CPMT 1989, 93] |
| A. | \[RX+N{{H}_{3}}\xrightarrow{{}}\] |
| B. | \[RCH=NOH+[H]\underset{{{C}_{2}}{{H}_{5}}OH}{\mathop{\xrightarrow{Na}}}\,\] |
| C. | \[RCN+{{H}_{2}}O\xrightarrow{{{H}^{+}}}\] |
| D. | \[RCON{{H}_{2}}+4H\xrightarrow{LiAl{{H}_{4}}}\] |
| Answer» D. \[RCON{{H}_{2}}+4H\xrightarrow{LiAl{{H}_{4}}}\] | |
| 10645. |
Chloropicrin is manufactured by the reaction between \[C{{l}_{2}},\,\,NaOH\] and |
| A. | Nitromethane |
| B. | Nitroethane |
| C. | Nitrophenol |
| D. | Nitrostyrene |
| Answer» B. Nitroethane | |
| 10646. |
Acetanilide can be prepared from aniline and which of the following |
| A. | Ethanol |
| B. | Acetaldehyde |
| C. | Acetone |
| D. | Acetic anhydride |
| Answer» E. | |
| 10647. |
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 | |
| 10648. |
Which amine will not react with nitrous acid? |
| A. | Methyl amine |
| B. | Ethyl amine |
| C. | Dimethyl amine |
| D. | N, N Dikethyl ethane amine |
| Answer» E. | |
| 10649. |
Benzamide on reaction with \[POC{{l}_{3}}\]gives |
| A. | aniline |
| B. | chlorobenzene |
| C. | benzylamine |
| D. | benzonitrile |
| Answer» E. | |
| 10650. |
Aniline is reacted with \[B{{r}_{2}}\]water and the resulting product is treated with an aqueous solution of \[NaN{{O}_{2}}\]in the presence of dil. \[HCl\] the resulting solution is converted into a tetraboronfluorate which is subsequently heated to dry. The final product is |
| A. | 1, 3, 5-tribromobenzene |
| B. | p-bromo fluorobenzene |
| C. | 2, 4, 6-tribromo fluorobenzene |
| D. | p-bromo aniline |
| Answer» D. p-bromo aniline | |