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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.
| 2501. |
Which of the following would be produced when acetylene reacts with HCl [MH CET 1999] |
| A. | \[C{{H}_{3}}C{{H}_{2}}Cl\] |
| B. | \[C{{H}_{3}}CHC{{l}_{2}}\] |
| C. | \[CHCl=CHCl\] |
| D. | \[C{{H}_{2}}=CHCl\] |
| Answer» C. \[CHCl=CHCl\] | |
| 2502. |
\[{{C}_{3}}{{H}_{8}}+C{{l}_{2}}\xrightarrow{\text{Light}}{{C}_{3}}{{H}_{7}}Cl+HCl\] is an example of which of the following types of reactions [AFMC 1997; CPMT 1999] |
| A. | Substitution |
| B. | Elimination |
| C. | Addition |
| D. | Rearrangement |
| Answer» B. Elimination | |
| 2503. |
In methyl alcohol solution, bromine reacts with ethylene to yield \[BrC{{H}_{2}}C{{H}_{2}}OC{{H}_{3}}\] in addition to 1, 2-dibromoethane because [Pb. PMT 1998] |
| A. | The ion formed initially may react with \[B{{r}^{-}}\] or \[C{{H}_{3}}OH\] |
| B. | The methyl alcohol solvates the bromine |
| C. | The reaction follows Markownikoff's rule |
| D. | This is a free-radical mechanism |
| Answer» B. The methyl alcohol solvates the bromine | |
| 2504. |
Chlorobenzene is prepared commercially by [JIPMER 2000; CPMT 1976; Pb. CET 2002] |
| A. | Raschig process |
| B. | Wurtz Fitting reaction |
| C. | Friedel-Craft?s reaction |
| D. | Grignard reaction |
| Answer» B. Wurtz Fitting reaction | |
| 2505. |
Decreasing order of reactivity of\[HX\]in the reaction \[ROH+HX\to RX+{{H}_{2}}O\] [RPET 2000; AIIMS 1983; MP PET 1996] |
| A. | \[HI>HBr>HCl>HF\] |
| B. | \[HBr>HCl>HI>HF\] |
| C. | \[HCl>HBr>HI>HF\] |
| D. | \[HF>HBr>HCl>HI\] |
| Answer» E. | |
| 2506. |
The chlorobenzene is generally obtained from a corresponding diazonium salt by reacting it with [MP PMT 2000] |
| A. | \[C{{u}_{2}}C{{l}_{2}}\] |
| B. | \[CuS{{O}_{4}}\] |
| C. | \[Cu\] |
| D. | \[Cu(N{{H}_{3}})_{4}^{2+}\] |
| Answer» B. \[CuS{{O}_{4}}\] | |
| 2507. |
\[{{C}_{2}}{{H}_{2}}\underset{{{H}_{2}}S{{O}_{4}}}{\mathop{\xrightarrow{HgOH\,\,1%}}}\,A\xrightarrow{[O]}B\], B is [CBSE PMT 1991; BHU 1995] |
| A. | An acid |
| B. | An aldehyde |
| C. | A ketone |
| D. | Ethanol |
| Answer» B. An aldehyde | |
| 2508. |
Carboxylic acids react with diazomethane to form [MP PMT/PET 1988; MP PMT 1990] |
| A. | Amine |
| B. | Alcohol |
| C. | Ester |
| D. | Amide |
| Answer» D. Amide | |
| 2509. |
Acetic acid is manufactured by the fermentation of [CPMT 1985] |
| A. | Ethanol |
| B. | Methanol |
| C. | Ethanal |
| D. | Methanal |
| Answer» B. Methanol | |
| 2510. |
Acetic acid will be obtained on oxidation of [J & K 2005] |
| A. | Ethanol |
| B. | Propanal |
| C. | Methanal |
| D. | Glyoxal |
| Answer» B. Propanal | |
| 2511. |
Acetic acid is obtained when [NCERT 1975; CPMT 1977] |
| A. | Methyl alcohol is oxidised with potassium permanganate |
| B. | Calcium acetate is distilled in the presence of calcium formate |
| C. | Acetaldehyde is oxidised with potassium dichromate and sulphuric acid |
| D. | Glycerol is heated with sulphuric acid |
| Answer» D. Glycerol is heated with sulphuric acid | |
| 2512. |
Salicylic acid is prepared from phenol by [AFMC 2005] |
| A. | Reimer Tiemann reaction |
| B. | Kolbe?s reaction |
| C. | Kolbe-electrolysis reaction |
| D. | None of these |
| Answer» B. Kolbe?s reaction | |
| 2513. |
The compound (X) is [IIT 2005] |
| A. | CH3COOH |
| B. | BrCH2 - COOH |
| C. | (CH3CO)2 O |
| D. | CHO - COOH |
| Answer» D. CHO - COOH | |
| 2514. |
Toluene is oxidised to benzoic acid by [BHU 2004; CPMT 1985] |
| A. | \[KMn{{O}_{4}}\] |
| B. | \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] |
| C. | \[{{H}_{2}}S{{O}_{4}}\] |
| D. | Both A and B |
| Answer» E. | |
| 2515. |
\[C{{H}_{3}}CON{{H}_{2}}\xrightarrow{NaN{{O}_{2}}/HCl}X\] [Pb. CET 2003] |
| A. | \[C{{H}_{3}}COOH\] |
| B. | \[C{{H}_{3}}CO\overset{+}{\mathop{N}}\,{{H}_{3}}C{{l}^{-}}\] |
| C. | \[C{{H}_{3}}N{{H}_{2}}\] |
| D. | \[C{{H}_{3}}CHO\] |
| Answer» B. \[C{{H}_{3}}CO\overset{+}{\mathop{N}}\,{{H}_{3}}C{{l}^{-}}\] | |
| 2516. |
Primary aldehyde on oxidation gives [DPMT 20004] |
| A. | Esters |
| B. | Carboxylic acid |
| C. | Ketones |
| D. | Alcohols |
| Answer» C. Ketones | |
| 2517. |
The compound \[X,\] in the reaction, is \[X\xrightarrow{C{{H}_{3}}MgI}Y\xrightarrow{hydrolysis}Mg(OH)I+C{{H}_{3}}COOH\] [Pb. CET 2003] |
| A. | \[C{{H}_{3}}CHO\] |
| B. | \[C{{O}_{2}}\] |
| C. | \[{{(C{{H}_{3}})}_{2}}CO\] |
| D. | \[HCHO\] |
| Answer» C. \[{{(C{{H}_{3}})}_{2}}CO\] | |
| 2518. |
When an acyl chloride is heated with \[Na\] salt of a carboxylic acid, the product is [DCE 2003] |
| A. | An ester |
| B. | An anhydride |
| C. | An alkene |
| D. | An aldehyde |
| Answer» C. An alkene | |
| 2519. |
In the reaction, \[{{C}_{6}}{{H}_{5}}OH\xrightarrow{NaOH}(A)\] \[\underset{140{}^\circ C,\ (4-7\,atm)}{\mathop{\xrightarrow{\ C{{O}_{2}}\ \ \ \ \ \ \ \ \ \ \ \ }}}\,(B)\] \[\xrightarrow{HCl}(C),\]the compound is [Pb. CET 2001] |
| A. | Benzoic acid |
| B. | Salicylaldehyde |
| C. | Chlorobenzene |
| D. | Salicylic acid |
| Answer» E. | |
| 2520. |
When succinic acid is heated, product formed is [Pb. CET 2000] |
| A. | Succinic anhydride |
| B. | Acetic acid |
| C. | \[C{{O}_{2}}\] and methane |
| D. | Propionic acid |
| Answer» B. Acetic acid | |
| 2521. |
Tischenko reaction yields ester in the presence of catalyst which is |
| A. | \[LiAl{{H}_{4}}\] |
| B. | N-bromosuccinamide |
| C. | \[Al{{(O{{C}_{2}}{{H}_{5}})}_{3}}\] |
| D. | \[Zn-Hg/HCl\] |
| Answer» D. \[Zn-Hg/HCl\] | |
| 2522. |
Tertiary alcohols \[(3{}^\circ )\] having atleast four carbon atoms upon drastic oxidation yield carboxylic acid with [MH CET 2004] |
| A. | One carbon atom less |
| B. | Two carbon atoms less |
| C. | Three carbon atom less |
| D. | All the above three options are correct |
| Answer» C. Three carbon atom less | |
| 2523. |
Which reaction is used for the preparation of \[\alpha -\] Bromoacetic acid? [MP PET 2004; MP PET/PMT 1998] |
| A. | Kolbe's Reaction |
| B. | Reimer-Tiemann Reaction |
| C. | Hell volhard Zelinsky Reaction |
| D. | Perkin's Reation |
| Answer» D. Perkin's Reation | |
| 2524. |
The silver salt of a fatty acid on refluxing with an alkyl halide gives an [KCET 2004] |
| A. | Acid |
| B. | Ester |
| C. | Ether |
| D. | Amine |
| Answer» C. Ether | |
| 2525. |
Ammonium acetate reacts with acetic acid at \[{{110}^{o}}C\] to form [MP PET 1991] |
| A. | Acetamide |
| B. | Formamide |
| C. | Ammonium cyanate |
| D. | Urea |
| Answer» B. Formamide | |
| 2526. |
Sodium acetate reacts with acetyl chloride to form [BIT 1992] |
| A. | Acetic acid |
| B. | Acetone |
| C. | Acetic anhydride |
| D. | Sodium formate |
| Answer» D. Sodium formate | |
| 2527. |
Ethyl acetate is obtained when methyl magnesium iodide reacts with [Tamil Nadu CET 2002] |
| A. | Ethyl formate |
| B. | Ethyl chloroformate |
| C. | Acetyl chloride |
| D. | Carbon dioxide |
| Answer» C. Acetyl chloride | |
| 2528. |
Hydrolysis of acetamide produces [DPMT 1984; MP PMT 1994; MP PET 2001] |
| A. | Acetic acid |
| B. | Acetaldehyde |
| C. | Methylamine |
| D. | Formic acid |
| Answer» B. Acetaldehyde | |
| 2529. |
Acetic anhydride is obtained from acetyl chloride by the reaction of [CPMT 1985, 93] |
| A. | \[{{P}_{2}}{{O}_{5}}\] |
| B. | \[{{H}_{2}}S{{O}_{4}}\] |
| C. | \[C{{H}_{3}}COONa\] |
| D. | \[C{{H}_{3}}COOH\] |
| Answer» D. \[C{{H}_{3}}COOH\] | |
| 2530. |
\[C{{O}_{2}}\] on reaction with ethyl magnesium bromide gives [BHU 1983] |
| A. | Ethane |
| B. | Propanoic acid |
| C. | Acetic acid |
| D. | None of these |
| Answer» C. Acetic acid | |
| 2531. |
Laboratory method for the preparation of acetyl chloride is [RPMT 2003] |
| A. | \[C{{H}_{3}}COOH+SOC{{l}_{2}}\to C{{H}_{3}}COCl\] |
| B. | \[C{{H}_{3}}COOH+PC{{l}_{3}}\to C{{H}_{3}}COCl\] |
| C. | \[C{{H}_{3}}COONa+PC{{l}_{3}}\to C{{H}_{3}}COCl\] |
| D. | All of these |
| Answer» B. \[C{{H}_{3}}COOH+PC{{l}_{3}}\to C{{H}_{3}}COCl\] | |
| 2532. |
The acid formed when propyl magnesium bromide is treated with carbon dioxide is [CPMT 1982, 84, 86; Pb. PMT 1998] |
| A. | \[{{C}_{3}}{{H}_{7}}COOH\] |
| B. | \[{{C}_{2}}{{H}_{5}}COOH\] |
| C. | Both A and B |
| D. | None of the above |
| Answer» B. \[{{C}_{2}}{{H}_{5}}COOH\] | |
| 2533. |
Which reagent will bring about the conversion of carboxylic acids into esters [CBSE PMT 2000] |
| A. | \[{{C}_{2}}{{H}_{5}}OH\] |
| B. | Dry \[HCl+{{C}_{2}}{{H}_{5}}OH\] |
| C. | \[LiAl{{H}_{4}}\] |
| D. | \[Al{{(O{{C}_{2}}{{H}_{5}})}_{3}}\] |
| Answer» C. \[LiAl{{H}_{4}}\] | |
| 2534. |
Rearrangement of an oxime to an amide in the presence of strong acid is called [Kerala CET 2000] |
| A. | Curtius rearrangement |
| B. | Fries rearrangement |
| C. | Backman rearrangement |
| D. | Sandmeyer reaction |
| Answer» D. Sandmeyer reaction | |
| 2535. |
Product formed by heating a mixture of ammonium chloride and potassium cyanate is |
| A. | \[{{N}_{2}}O\] |
| B. | \[N{{H}_{3}}\] |
| C. | \[C{{H}_{3}}N{{H}_{2}}\] |
| D. | \[{{H}_{2}}NCON{{H}_{2}}\] |
| Answer» E. | |
| 2536. |
Heating a mixture of ethyl alcohol and acetic acid in presence of conc. \[{{H}_{2}}S{{O}_{4}}\] produces a fruity smelling compound. This reaction is called [AIIMS 1996] |
| A. | Neutralisation |
| B. | Ester hydrolysis |
| C. | Esterification |
| D. | Williamson's synthesis |
| Answer» D. Williamson's synthesis | |
| 2537. |
In esterification, \[O{{H}^{-}}\] ion for making \[{{H}_{2}}O\] comes from [CPMT 1996] |
| A. | Acid |
| B. | Alcohol |
| C. | Ketone |
| D. | Carbohydrate |
| Answer» B. Alcohol | |
| 2538. |
Glacial acetic is obtained by [KCET 2002] |
| A. | Distilling vinegar |
| B. | Crystallizing separating and melting acetic acid |
| C. | Treating vinegar with dehydrating agent |
| D. | Chemically separating acetic acid |
| Answer» C. Treating vinegar with dehydrating agent | |
| 2539. |
By aerial oxidation, which one of the following gives phthalic acid [Tamil Nadu CET 2002] |
| A. | Naphthalene |
| B. | Banzene |
| C. | Mesitylene |
| D. | Toluene |
| Answer» B. Banzene | |
| 2540. |
o-xylene when oxidised in presence of \[{{V}_{2}}{{O}_{5}}\] the product is |
| A. | Benzoic acid |
| B. | Phenyl acetic acid |
| C. | Phthalic acid |
| D. | Acetic acid |
| Answer» D. Acetic acid | |
| 2541. |
The reaction \[C{{H}_{3}}CH=C{{H}_{3}}\underset{{{H}^{+}}}{\mathop{\xrightarrow{CO+{{H}_{2}}O}}}\,C{{H}_{3}}-\underset{COOH\,\,\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{CH-C{{H}_{3}}}}\,}}\,\] is known as [MP PMT 2002] |
| A. | Wurtz reactions |
| B. | Koch reaction |
| C. | Clemenson's reduction |
| D. | Kolbe's reaction |
| Answer» C. Clemenson's reduction | |
| 2542. |
When formic acid reacts with \[PC{{l}_{5}}\] it forms [MNR 1982] |
| A. | Formyl chloride |
| B. | Acetyl chloride |
| C. | Methyl chloride |
| D. | Propionyl chloride |
| Answer» B. Acetyl chloride | |
| 2543. |
Acetyl chloride cannot be obtained by treating acetic acid with [CPMT 1985] |
| A. | \[CHC{{l}_{3}}\] |
| B. | \[SOC{{l}_{2}}\] |
| C. | \[PC{{l}_{3}}\] |
| D. | \[PC{{l}_{5}}\] |
| Answer» B. \[SOC{{l}_{2}}\] | |
| 2544. |
Formic acid is obtained when [NCERT 1974] |
| A. | Calcium acetate is heated with conc. \[{{H}_{2}}S{{O}_{4}}\] |
| B. | Calcium formate is heated with calcium acetate |
| C. | Glycerol is heated with oxalic acid at \[{{110}^{o}}C\] |
| D. | Acetaldehyde is oxidised with \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] and \[{{H}_{2}}S{{O}_{4}}\] |
| Answer» D. Acetaldehyde is oxidised with \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] and \[{{H}_{2}}S{{O}_{4}}\] | |
| 2545. |
Two moles of acetic acid are heated with \[{{P}_{2}}{{O}_{5}}.\] The product formed is [MP PET/PMT 1988] |
| A. | 2 moles of ethyl alcohol |
| B. | Formic anhydride |
| C. | Acetic anhydride |
| D. | 2 moles of methyl cyanide |
| Answer» D. 2 moles of methyl cyanide | |
| 2546. |
\[{{(C{{H}_{3}})}_{2}}CO\underset{(HCl)}{\mathop{\xrightarrow{NaCN}}}\,A\underset{\Delta }{\mathop{\xrightarrow{{{H}_{3}}{{O}^{+}}}}}\,B\] In the above sequence of reactions A and B are [CPMT 2000] |
| A. | \[{{(C{{H}_{3}})}_{2}}C(OH)CN,\,{{(C{{H}_{3}})}_{2}}C(OH)COOH\] |
| B. | \[{{(C{{H}_{3}})}_{2}}C(OH)CN,\,{{(C{{H}_{3}})}_{2}}C{{(OH)}_{2}}\] |
| C. | \[{{(C{{H}_{3}})}_{2}}C(OH)CN,\,{{(C{{H}_{3}})}_{2}}CHCOOH\] |
| D. | \[{{(C{{H}_{3}})}_{2}}C(OH)CN,{{(C{{H}_{3}})}_{2}}C=O\] |
| Answer» B. \[{{(C{{H}_{3}})}_{2}}C(OH)CN,\,{{(C{{H}_{3}})}_{2}}C{{(OH)}_{2}}\] | |
| 2547. |
When benzyl alcohol is oxidised with \[KMn{{O}_{4}},\] the product obtained is [SCRA 1991] |
| A. | Benzaldehyde |
| B. | Benzoic acid |
| C. | \[C{{O}_{2}}\] and \[{{H}_{2}}O\] |
| D. | None of these |
| Answer» C. \[C{{O}_{2}}\] and \[{{H}_{2}}O\] | |
| 2548. |
Which of the following on hydrolysis forms acetic acid [BHU 1997] |
| A. | \[C{{H}_{3}}CN\] |
| B. | \[C{{H}_{3}}OH\] |
| C. | \[{{C}_{2}}{{H}_{5}}OH\] |
| D. | \[{{C}_{2}}{{H}_{5}}N{{H}_{2}}\] |
| Answer» B. \[C{{H}_{3}}OH\] | |
| 2549. |
The product D of the reaction \[C{{H}_{3}}Cl\xrightarrow{KCN}(A)\xrightarrow{{{H}_{2}}O}(B)\xrightarrow{N{{H}_{3}}}(C)\xrightarrow{\Delta }(D)\] is [MP PET 1997] |
| A. | \[C{{H}_{3}}C{{H}_{2}}N{{H}_{2}}\] |
| B. | \[C{{H}_{3}}CN\] |
| C. | \[HCON{{H}_{2}}\] |
| D. | \[C{{H}_{3}}CON{{H}_{2}}\] |
| Answer» E. | |
| 2550. |
Hydrolysis of \[C{{H}_{3}}C{{H}_{2}}N{{O}_{2}}\] with 85% \[{{H}_{2}}S{{O}_{4}}\] gives [KCET 1996] |
| A. | \[C{{H}_{3}}C{{H}_{2}}OH\] |
| B. | \[{{C}_{2}}{{H}_{6}}\] |
| C. | \[C{{H}_{3}}CH=NOH\] |
| D. | \[C{{H}_{3}}COOH\] |
| Answer» E. | |