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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.
| 1751. |
The compound which reacts with Fehling solution is [CPMT 1989] |
| A. | \[{{C}_{6}}{{H}_{5}}COOH\] |
| B. | HCOOH |
| C. | \[{{C}_{6}}{{H}_{5}}CHO\] |
| D. | \[C{{H}_{2}}ClC{{H}_{3}}\] |
| Answer» C. \[{{C}_{6}}{{H}_{5}}CHO\] | |
| 1752. |
Which one of the following undergoes reaction with 50% sodium hydroxide solution to give the corresponding alcohol and acid [AIEEE 2004] |
| A. | Butanal |
| B. | Benzaldehyde |
| C. | Phenol |
| D. | Benzoic acid |
| Answer» C. Phenol | |
| 1753. |
Schiff's reagent gives pink colour with [EAMCET 1980; MP PMT 2000] |
| A. | Aldehydes |
| B. | Ethers |
| C. | Ketones |
| D. | Carboxylic acid |
| Answer» B. Ethers | |
| 1754. |
Which of the following compounds containing carbonyl group will give coloured crystalline compound with [Kerala (Med.) 2001] |
| A. | \[C{{H}_{3}}COCl\] |
| B. | \[C{{H}_{3}}COC{{H}_{3}}\] |
| C. | \[C{{H}_{3}}CO(O{{C}_{2}}{{H}_{5}})\,\] |
| D. | \[C{{H}_{3}}CON{{H}_{2}}\] |
| E. | \[HO({{C}_{6}}{{H}_{4}})COOH\] |
| Answer» C. \[C{{H}_{3}}CO(O{{C}_{2}}{{H}_{5}})\,\] | |
| 1755. |
Which of the following compound will react with ethanolic KCN [IIT-JEE 1984] |
| A. | Ethane |
| B. | Acetyl chloride |
| C. | Chlorobenzene |
| D. | Benzaldehyde |
| Answer» E. | |
| 1756. |
Which does not react with Fehling solution [MNR 1983, 93] |
| A. | Acetaldehyde |
| B. | Benzaldehyde |
| C. | Glucose |
| D. | Formic acid |
| Answer» C. Glucose | |
| 1757. |
Which compound undergoes iodoform reaction [DPMT 1984; CPMT 1989] |
| A. | HCHO |
| B. | \[C{{H}_{3}}CHO\] |
| C. | \[C{{H}_{3}}OH\] |
| D. | \[C{{H}_{3}}COOH\] |
| Answer» C. \[C{{H}_{3}}OH\] | |
| 1758. |
Which of the following is used in the manufacture of thermosetting plastics |
| A. | Formaldehyde |
| B. | Acetaldehyde |
| C. | Acetone |
| D. | Benzaldehyde |
| Answer» B. Acetaldehyde | |
| 1759. |
The reagent with which both aldehyde and acetone react easily is [CPMT 1973, 74, 89; BIT 1992] |
| A. | Fehling's reagent |
| B. | Grignard reagent |
| C. | Schiff's reagent |
| D. | Tollen's reagent |
| Answer» C. Schiff's reagent | |
| 1760. |
Phenylmethanol can be prepared by reducing the benzaldehyde with [CBSE PMT 1997] |
| A. | \[C{{H}_{3}}Br\] |
| B. | Zn and HCl |
| C. | \[C{{H}_{3}}Br\] and Na |
| D. | \[C{{H}_{3}}I\] and \[Mg\] |
| Answer» C. \[C{{H}_{3}}Br\] and Na | |
| 1761. |
Acetal is obtained by reacting in the presence of dry HCl and alcohol with [MP PET 1996] |
| A. | Aldehyde |
| B. | Ketone |
| C. | Ether |
| D. | Carboxylic acid |
| Answer» B. Ketone | |
| 1762. |
Which one of the following on oxidation will not give a carboxylic acid with the same number of carbon atoms [CBSE PMT 1992; MP PET 1996] |
| A. | \[C{{H}_{3}}COC{{H}_{3}}\] |
| B. | \[CC{{l}_{3}}C{{H}_{2}}CHO\] |
| C. | \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}OH\] |
| D. | \[C{{H}_{3}}C{{H}_{2}}CHO\] |
| Answer» B. \[CC{{l}_{3}}C{{H}_{2}}CHO\] | |
| 1763. |
Pyrolysis of acetone gives \[C{{H}_{2}}=C=O\] called |
| A. | Methylene oxide |
| B. | Methyl carbon monoxide |
| C. | Ketene |
| D. | Methone |
| Answer» D. Methone | |
| 1764. |
Schiff's reagent is [MP PMT 1989] |
| A. | Magenta colour solution decolourised with sulphurous acid |
| B. | Ammoniacal cobalt chloride solution |
| C. | Ammoniacal manganese sulphate solution |
| D. | Magenta solution decolourised with chlorine |
| Answer» B. Ammoniacal cobalt chloride solution | |
| 1765. |
Aldol condensation will not be observed in [GATE 2001] |
| A. | Chloral |
| B. | Phenyl acetaldehyde |
| C. | Hexanal |
| D. | Ethanol |
| Answer» B. Phenyl acetaldehyde | |
| 1766. |
Which of the following on reaction with conc. NaOH gives an alcohol [MP PET 1996] |
| A. | Methanal |
| B. | Ethanal |
| C. | Propanal |
| D. | Butanal |
| Answer» B. Ethanal | |
| 1767. |
Reduction of an aldehyde produces [MP PMT 1994; MP PET 2001] |
| A. | Primary alcohol |
| B. | Monocarboxylic acid |
| C. | Secondary alcohol |
| D. | Tertiary alcohol |
| Answer» B. Monocarboxylic acid | |
| 1768. |
Fehling solution is [MP PMT 1989] |
| A. | Ammoniacal cuprous chloride solution |
| B. | Acidified copper sulphate solution |
| C. | Copper sulphate and sodium hydroxide + Rochelle salt |
| D. | None of these |
| Answer» D. None of these | |
| 1769. |
Glucose + Tollen's reagent \[\to \] Silver mirror shows [CPMT 1997] |
| A. | Presence of acidic group |
| B. | Presence of alkaline group |
| C. | Presence of ketonic group |
| D. | Presence of aldehyde group |
| Answer» E. | |
| 1770. |
Benzaldehyde reacts with ammonia to form [CPMT 1989; AFMC 1998] |
| A. | Benzaldehyde ammonia |
| B. | Urotropine |
| C. | Hydrobenzamide |
| D. | Aniline |
| Answer» D. Aniline | |
| 1771. |
Base catalysed aldol condensation occurs with [IIT-JEE 1991] |
| A. | Benzaldehyde |
| B. | 2, 2-dimethyl propionaldehyde |
| C. | Acetaldehyde |
| D. | Formaldehyde |
| Answer» D. Formaldehyde | |
| 1772. |
Grignard's reagent reacts with ethanal (acetaldehyde) and propanone to give |
| A. | Higher aldehydes with ethanal and higher ketones with propanone |
| B. | Primary alcohols with ethanal and secondary alcohols with propanone |
| C. | Ethers with ethanal and alcohols with propanone |
| D. | Secondary alcohols with ethanal and tertiary alcohols with propanone |
| Answer» E. | |
| 1773. |
Benzaldehyde and acetaldehyde can be differentiated by |
| A. | HCN |
| B. | \[N{{H}_{2}}OH\] |
| C. | Hydrazine |
| D. | NaOH solution |
| Answer» E. | |
| 1774. |
When acetaldehyde reacts with \[PC{{l}_{5}},\] the resulting compound is [MP PMT 1992, 93] |
| A. | Ethyl chloride |
| B. | Ethylene chloride |
| C. | Ethylidene chloride |
| D. | Trichloro acetaldehyde |
| Answer» D. Trichloro acetaldehyde | |
| 1775. |
Which of the following products is formed when benzaldehyde is treated with \[C{{H}_{3}}MgBr\] and the addition product so obtained is subjected to acid hydrolysis [Haryana CEET 2000] |
| A. | Secondary alcohol |
| B. | A primary alcohol |
| C. | Phenol |
| D. | Tert-Butyl alcohol |
| Answer» B. A primary alcohol | |
| 1776. |
The product of the reaction between ammonia and formaldehyde is [MP PMT 1993] |
| A. | Urotropine |
| B. | Formamide |
| C. | Paraformaldehyde |
| D. | Methanol |
| Answer» B. Formamide | |
| 1777. |
When acetone is heated with hydroxylamine, the compound formed is [MP PMT 1993] |
| A. | Cyanohydrin |
| B. | Oxime |
| C. | Semicarbazone |
| D. | Hydrazone |
| Answer» C. Semicarbazone | |
| 1778. |
Cannizzaro reaction is not shown by [BHU 1980; IIT 1983; KCET 1993; Bihar MEE 1995; RPMT 1997, 2000, 02] |
| A. | HCHO |
| B. | \[{{C}_{6}}{{H}_{5}}CHO\] |
| C. | \[C{{H}_{3}}CHO\] |
| D. | All of these |
| Answer» D. All of these | |
| 1779. |
The reaction of an aldehyde with hydroxylamine gives a product which is called [MP PET 1993; AFMC 2002] |
| A. | Aminohydroxide |
| B. | Hydrazone |
| C. | Semicarbazone |
| D. | Oxime |
| Answer» E. | |
| 1780. |
Magenta is [DPMT 1982; Kurukshetra CEE 1998] |
| A. | Alkaline phenolphthalein |
| B. | Methyl red |
| C. | p-rosaniline hydrochloride |
| D. | Red litmus |
| Answer» D. Red litmus | |
| 1781. |
Urotropine is |
| A. | Hexamethylene tetramine |
| B. | Hexaethylene tetramine |
| C. | Hexamethylene diamine |
| D. | None of these |
| Answer» B. Hexaethylene tetramine | |
| 1782. |
Boiling point of acetone is [CPMT 1975, 89] |
| A. | \[{{56}^{o}}C\] |
| B. | \[{{60}^{o}}C\] |
| C. | \[{{100}^{o}}C\] |
| D. | \[{{90}^{o}}C\] |
| Answer» B. \[{{60}^{o}}C\] | |
| 1783. |
Which of the following would undergo aldol condensation [MP PMT 1986; BHU 1995] |
| A. | \[CC{{l}_{3}}.CHO\] |
| B. | \[C{{H}_{3}}-\underset{\underset{C{{H}_{3}}}{\mathop{|\,\,\,\,\,\,\,}}\,}{\mathop{\overset{\overset{C{{H}_{3}}}{\mathop{|\,\,\,\,\,\,\,}}\,}{\mathop{C\,\,-}}\,}}\,CHO\] |
| C. | \[C{{H}_{3}}.C{{H}_{2}}.CHO\] |
| D. | HCHO |
| Answer» D. HCHO | |
| 1784. |
When acetaldehyde is heated with Tollen's reagent, following is obtained [CPMT 1989; MP PET/PMT 1988] |
| A. | Methyl alcohol |
| B. | Silver acetate |
| C. | Silver mirror |
| D. | Formaldehyde |
| Answer» D. Formaldehyde | |
| 1785. |
The reaction of acetaldehyde with conc. \[KMn{{O}_{4}}\] gives [DPMT 1982; AIIMS 1996] |
| A. | \[C{{H}_{3}}COOH\] |
| B. | \[C{{H}_{3}}C{{H}_{2}}OH\] |
| C. | HCHO |
| D. | \[C{{H}_{3}}OH\] |
| Answer» B. \[C{{H}_{3}}C{{H}_{2}}OH\] | |
| 1786. |
Aldehyde turns pink with [Bihar MEE 1997] |
| A. | Benedict solution |
| B. | Schiff reagent |
| C. | Fehling solution |
| D. | Tollen's reagent |
| E. | Mollisch reagent |
| Answer» C. Fehling solution | |
| 1787. |
When \[C{{H}_{3}}COC{{H}_{3}}\] reacts with \[C{{l}_{2}}\] and NaOH, which of the following is formed [CPMT 1996] |
| A. | \[CHC{{l}_{3}}\] |
| B. | \[CC{{l}_{4}}\] |
| C. | \[CC{{l}_{2}}{{H}_{2}}\] |
| D. | \[C{{H}_{3}}Cl\] |
| Answer» B. \[CC{{l}_{4}}\] | |
| 1788. |
Which one is used in the manufacture of mirror [MP PET 1992] |
| A. | Red lead (litharge) |
| B. | Ammoniacal \[AgN{{O}_{3}}\] |
| C. | Ammoniacal \[AgN{{O}_{3}}+\] Red lead |
| D. | Ammoniacal \[AgN{{O}_{3}}+HCHO\] |
| Answer» E. | |
| 1789. |
What is the name of reaction when benzaldehyde changes into benzyl alcohol [CPMT 1996; RPET 1999] |
| A. | Friedel-Craft's reaction |
| B. | Kolbe's reaction |
| C. | Wurtz reaction |
| D. | Cannizzaro reaction |
| Answer» E. | |
| 1790. |
Identify the product \[Y\] in the sequence \[C{{H}_{3}}CHO+C{{H}_{3}}Mgl\xrightarrow{\text{Ether}}X\xrightarrow{{{H}_{2}}O/{{H}^{+}}}Y\] [Kerala (Med.) 2001] |
| A. | \[C{{H}_{3}}OH\] |
| B. | \[C{{H}_{3}}C{{H}_{2}}OH\] |
| C. | \[{{(C{{H}_{3}})}_{2}}CHOH\] |
| D. | \[{{(C{{H}_{3}})}_{3}}COH\] |
| Answer» D. \[{{(C{{H}_{3}})}_{3}}COH\] | |
| 1791. |
Propanal on treatment with dilute sodium hydroxide forms [Kerala CET 2000] |
| A. | \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}C{{H}_{2}}C{{H}_{2}}CHO\] |
| B. | \[C{{H}_{3}}C{{H}_{2}}CH(OH)C{{H}_{2}}C{{H}_{2}}CHO\] |
| C. | \[C{{H}_{3}}C{{H}_{2}}CH(OH)CH(C{{H}_{3}})CHO\] |
| D. | \[C{{H}_{3}}C{{H}_{2}}COONa\] |
| Answer» D. \[C{{H}_{3}}C{{H}_{2}}COONa\] | |
| 1792. |
Which one of the following pairs is not correctly matched [SCRA 2001] |
| A. | \[>C=O\xrightarrow{\text{Clemenson }\!\!'\!\!\text{ s reduction}}>C{{H}_{2}}\] |
| B. | \[>C=O\xrightarrow{\text{Wolf -Kishner reduction}}>CHOH\] |
| C. | \[-COCl\xrightarrow{\text{Rosenmund }\!\!'\!\!\text{ s reduction}}CHO\] |
| D. | \[-C\equiv N\xrightarrow{\text{Stephen reduction}}CHO\] |
| Answer» C. \[-COCl\xrightarrow{\text{Rosenmund }\!\!'\!\!\text{ s reduction}}CHO\] | |
| 1793. |
Identify the reactant X and the product Y \[C{{H}_{3}}-CO-C{{H}_{3}}+X\to \underset{{}}{\mathop{{{(C{{H}_{3}})}_{3}}}}\,C-OMg-Cl\] \[Y+Mg\ (OH)\ Cl\] [Kerala PMT 2003] |
| A. | \[X=MgC{{l}_{2}};\ \ Y=C{{H}_{3}}CH=C{{H}_{2}}\] |
| B. | \[X=C{{H}_{3}}MgCl;\ Y={{C}_{2}}{{H}_{5}}COC{{H}_{3}}\] |
| C. | \[X=C{{H}_{3}}MgCl;\ Y={{(C{{H}_{3}})}_{3}}\ C-OH\] |
| D. | \[X={{C}_{2}}{{H}_{5}}MgCl;\,Y={{(C{{H}_{3}})}_{3}}C-OH\] |
| Answer» D. \[X={{C}_{2}}{{H}_{5}}MgCl;\,Y={{(C{{H}_{3}})}_{3}}C-OH\] | |
| 1794. |
Electrophilic substitution of with bromine gives [Kerala (Med.) 2002] |
| A. | 1, 4, 6-tribromo aniline |
| B. | 2, 4, 6-tribromo aniline |
| C. | 4-bromo aniline |
| D. | 3-bromo aniline |
| Answer» C. 4-bromo aniline | |
| 1795. |
The unshared pair of electrons on a cyanide ion can acts as [Kerala (Med.) 2002] |
| A. | Isocyanide centre |
| B. | Amido centre |
| C. | Cationic centre |
| D. | Nucleophilic centre |
| Answer» D. Nucleophilic centre | |
| 1796. |
In the reaction \[{{C}_{6}}{{H}_{5}}CHO+{{C}_{6}}{{H}_{5}}N{{H}_{2}}\to \]\[{{C}_{6}}{{H}_{5}}N=HC{{C}_{6}}{{H}_{5}}+{{H}_{2}}O,\] the compound \[{{C}_{6}}{{H}_{5}}N=CH{{C}_{6}}{{H}_{5}}\] is known as [RPMT 2000; AIIMS 2002; AMU 2001] |
| A. | Aldol |
| B. | Schiff?s reagent |
| C. | Schiff?s base |
| D. | Benedict reagent |
| Answer» D. Benedict reagent | |
| 1797. |
Reaction of aniline with benzaldehyde is [RPMT 2002] |
| A. | Polymerisation |
| B. | Condensation |
| C. | Addition |
| D. | Substitution |
| Answer» C. Addition | |
| 1798. |
Pure aniline is a [UPSEAT 2001] |
| A. | Colourless solid |
| B. | Brown coloured solid |
| C. | Colourless liquid |
| D. | Brown coloured liquid |
| Answer» D. Brown coloured liquid | |
| 1799. |
An isocyanide on hydrolysis gives [AMU 2001] |
| A. | An amide |
| B. | A carboxylic acid and ammonia |
| C. | A N-substituted amide |
| D. | A 1o-amine and formic acid |
| Answer» E. | |
| 1800. |
Methyl isocyanide on hydrolysis gives [UPSEAT 2001] |
| A. | \[C{{H}_{3}}N{{H}_{2}}\] |
| B. | HCOOH |
| C. | \[C{{H}_{3}}COOH\] |
| D. | Both A and B |
| Answer» E. | |