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MCQOPTIONS
This section includes 1187 Mcqs, each offering curated multiple-choice questions to sharpen your NEET knowledge and support exam preparation. Choose a topic below to get started.
| 751. |
From the ozonolysis products, the two isomers A and B can be distinguished with the help of |
| A. | Fehling solution |
| B. | Tollen's reagent |
| C. | Haloformtest |
| D. | only spectroscopy |
| Answer» D. only spectroscopy | |
| 752. |
Calculate number of molecules of Grignard reagent consumed by 1 molecule of following compound. |
| A. | 5 |
| B. | 2 |
| C. | 3 |
| D. | 1 |
| Answer» B. 2 | |
| 753. |
Product. The product formed in the reaction is- |
| A. | |
| B. | \[Me-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-Ph\] |
| C. | \[Me-\underset{Ph}{\mathop{\underset{|}{\mathop{\overset{OH}{\mathop{\overset{|}{\mathop{C}}\,}}\,}}\,}}\,-COOH\] |
| D. | \[Ph-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-O-Me\] |
| Answer» D. \[Ph-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-O-Me\] | |
| 754. |
Identify Z in the sequence \[C{{H}_{3}}COON{{H}_{4}}\xrightarrow{\Delta }X\xrightarrow[\Delta ]{{{P}_{2}}{{O}_{5}}}Y\xrightarrow{{{H}_{2}}O/{{H}^{+}}}Z\] |
| A. | \[C{{H}_{3}}C{{H}_{2}}CON{{H}_{2}}\] |
| B. | \[C{{H}_{3}}CN\] |
| C. | \[C{{H}_{3}}COOH\] |
| D. | \[{{(C{{H}_{3}}CO)}_{2}}O\] |
| Answer» D. \[{{(C{{H}_{3}}CO)}_{2}}O\] | |
| 755. |
Arrange the following in order of decreasing acidity [A] [B] [C] |
| A. | C>A>B |
| B. | C>B>A |
| C. | A>C>B |
| D. | A>B>C |
| Answer» B. C>B>A | |
| 756. |
The reagents employed to carry the following transformation |
| A. | \[LiAl{{H}_{4}},{{H}_{2}}S{{O}_{4}}/heat\] |
| B. | \[PCC/C{{H}_{2}}C{{l}_{2}}\] followed by \[HI{{O}_{4}}\] |
| C. | \[NaB{{H}_{4}}/C{{H}_{3}}OH\] followed by \[HI{{O}_{4}}\] |
| D. | \[{{O}_{3}}\] followed by \[{{(C{{H}_{3}})}_{2}}S\] |
| Answer» D. \[{{O}_{3}}\] followed by \[{{(C{{H}_{3}})}_{2}}S\] | |
| 757. |
Identify appropriate reagents for the above reaction: |
| A. | \[a=B{{r}_{2}}/CC{{l}_{4}},\] \[b=aq.KOH\] |
| B. | \[a=B{{r}_{2}}/{{H}^{+}},\] \[b=aq.KOH\] |
| C. | \[a=B{{r}_{2}}/{{H}^{+}},\] \[b=alc.KOH\] |
| D. | \[a=B{{r}_{2}}/H{{O}^{-}},\] \[b=aq.KOH\] |
| Answer» D. \[a=B{{r}_{2}}/H{{O}^{-}},\] \[b=aq.KOH\] | |
| 758. |
End product of the following sequence of reactions are: |
| A. | yellow ppt. of \[CH{{I}_{3}}\], |
| B. | yellow ppt. of \[CH{{I}_{3}}\], |
| C. | yellow ppt. of \[CH{{I}_{3}}\], |
| D. | yellow ppt. of \[CH{{I}_{3}}\], |
| Answer» D. yellow ppt. of \[CH{{I}_{3}}\], | |
| 759. |
Which is major product formed when acetone is heated with iodine and potassium hydroxide? |
| A. | lodoacetone |
| B. | Acetic acid |
| C. | lodoform |
| D. | Acetophenone |
| Answer» D. Acetophenone | |
| 760. |
Which one of the following reactions will not result in the formation of carbon-carbon bond? |
| A. | Reimer-Tieman reaction |
| B. | Friedel Craft's acylation |
| C. | Wurtz reaction |
| D. | Cannizzaro reaction |
| Answer» E. | |
| 761. |
In the reaction sequence \[2C{{H}_{3}}CHO\xrightarrow{O{{H}^{-}}}A\xrightarrow{\Delta }B;\] the product B is: |
| A. | \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-OH\] |
| B. | \[C{{H}_{3}}-CH=CH-CHO\] |
| C. | \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{3}}\] |
| D. | \[C{{H}_{3}}-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-C{{H}_{3}}\] |
| Answer» C. \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{3}}\] | |
| 762. |
Phthalic acid reacts with resorcinol in the presence of concentrated \[{{H}_{2}}S{{O}_{4}}\] to give: |
| A. | Phenolphthalein |
| B. | Alizarin |
| C. | Coumarin |
| D. | Fluorescein |
| Answer» E. | |
| 763. |
An ether [A], \[{{C}_{5}}{{H}_{12}}O\], when heated with excess of hot concentrated HI produced two alkyl halides which when treated with \[NaOH\] yielded compounds [B] and [C]. Oxidation of [B] and [C] gave a propanone and an ethanoic acid respectively. The IUPAC name of the ether [A] is: |
| A. | 2-ethoxypropane |
| B. | ethoxypropane |
| C. | methoxybutane |
| D. | 2-methoxybutane |
| Answer» B. ethoxypropane | |
| 764. |
3 moles of ethanol react with one mole of phosphorus tribromide to form 3 moles of bromoethane and one mole of X. Which of the following is X? |
| A. | \[{{H}_{3}}P{{O}_{4}}\] |
| B. | \[{{H}_{3}}P{{O}_{2}}\] |
| C. | \[HP{{O}_{3}}\] |
| D. | \[{{H}_{3}}P{{O}_{3}}\] |
| Answer» E. | |
| 765. |
The following change can be carried out with |
| A. | \[NaB{{H}_{4}}\] |
| B. | \[LiAI{{H}_{4}}\] |
| C. | \[{{H}_{2}}/Pt\] |
| D. | \[PCC/C{{H}_{2}}C{{l}_{2}}\] |
| Answer» C. \[{{H}_{2}}/Pt\] | |
| 766. |
Which of the following diols would cleave into two fragments with \[HI{{O}_{4}}\] |
| A. | 1, 3-hexanediol |
| B. | 2, 4-hexanediol |
| C. | 1, 6-hexanediol |
| D. | 3, 4-hexanediol |
| Answer» E. | |
| 767. |
Arrange the following in increasing order of their acidity? [a] o-cresol, [b] salicylic acid, [c] phenol |
| A. | \[c<a<b\] |
| B. | \[b<c<a\] |
| C. | \[a<b<a\] |
| D. | \[a<c<b\] |
| Answer» E. | |
| 768. |
Which one/ones of the following reactions will yield 2-propanol? I. \[C{{H}_{2}}=CH-C{{H}_{3}}+{{H}_{2}}O\xrightarrow{H+}\] II. \[C{{H}_{3}}-CHO\xrightarrow[(ii)\,{{H}_{2}}O]{(i)\,C{{H}_{3}}MgI}\] III. \[C{{H}_{2}}O\xrightarrow[(ii)\,{{H}_{2}}O]{(i)\,{{C}_{2}}{{H}_{5}}MgI}\] IV. \[C{{H}_{2}}=CH-C{{H}_{3}}\xrightarrow{Neutral\,KMn{{O}_{4}}}\] |
| A. | I and II |
| B. | II and III |
| C. | III and I |
| D. | II and IV |
| Answer» B. II and III | |
| 769. |
What is Z in the following sequence of reactions? \[Z\xrightarrow{PC{{l}_{5}}}X\xrightarrow{~Alc.KOH}~Y~\xrightarrow[\left( ii \right){{H}_{2}}O;\text{ }boil]{\left( i \right)Conc.{{H}_{2}}S{{O}_{4}}~}Z\] |
| A. | \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}OH\] |
| B. | \[C{{H}_{3}}CH(OH)C{{H}_{3}}\] |
| C. | \[{{(C{{H}_{3}}C{{H}_{2}})}_{2}}CHOH\] |
| D. | \[C{{H}_{3}}CH=C{{H}_{2}}\] |
| Answer» C. \[{{(C{{H}_{3}}C{{H}_{2}})}_{2}}CHOH\] | |
| 770. |
Correct increasing order of acidity is as follows |
| A. | \[{{H}_{2}}O,{{C}_{2}}{{H}_{2}},{{H}_{2}}C{{O}_{3}}\], phenol |
| B. | \[{{C}_{2}}{{H}_{2}},{{H}_{2}}O,{{H}_{2}}C{{O}_{3}}\], phenol |
| C. | phenol, \[{{C}_{2}}{{H}_{2}},{{H}_{2}}C{{O}_{3}},{{H}_{2}}O\] |
| D. | \[{{C}_{2}}{{H}_{2}},{{H}_{2}}O\], phenol, \[,{{H}_{2}}C{{O}_{3}}\] |
| Answer» E. | |
| 771. |
Rate of dehydration of alcohols follows the order: |
| A. | \[2{}^\circ >1{}^\circ >C{{H}_{3}}OH>3{}^\circ \] |
| B. | \[3{}^\circ >2{}^\circ >1{}^\circ >C{{H}_{3}}OH\] |
| C. | \[2{}^\circ >3{}^\circ >1{}^\circ >C{{H}_{3}}OH\] |
| D. | \[C{{H}_{3}}OH>1{}^\circ >2{}^\circ >3{}^\circ \] |
| Answer» C. \[2{}^\circ >3{}^\circ >1{}^\circ >C{{H}_{3}}OH\] | |
| 772. |
The major product P in the following reaction is \[{{\left( C{{H}_{3}} \right)}_{3}}COH+{{C}_{2}}{{H}_{5}}OH\xrightarrow{H+}P\] |
| A. | \[{{\left( C{{H}_{3}} \right)}_{3}}COC{{\left( C{{H}_{3}} \right)}_{3}}\] |
| B. | \[{{\left( C{{H}_{3}} \right)}_{3}}CO{{C}_{2}}{{H}_{5}}\] |
| C. | \[{{C}_{2}}{{H}_{5}}O{{C}_{2}}{{H}_{5}}\] |
| D. | \[{{\left( C{{H}_{3}} \right)}_{2}}C=C{{H}_{2}}\] |
| Answer» C. \[{{C}_{2}}{{H}_{5}}O{{C}_{2}}{{H}_{5}}\] | |
| 773. |
Dehydration of alcohols by conc. \[{{H}_{2}}S{{O}_{4}}\] takes place according to following steps: The slowest and fastest steps in the above reaction are |
| A. | step 1 is slowest, while 3 is fastest. |
| B. | step 2 is slowest, while 3 is fastest. |
| C. | step 2 is slowest, while 4 is fastest. |
| D. | all steps proceed at equal rate. |
| Answer» D. all steps proceed at equal rate. | |
| 774. |
In order to get 2-hydroxybenzaldehyde from phenol, which of the following reagents is required? |
| A. | \[{{(C{{H}_{3}}CO)}_{2}}O,{{H}_{2}}S{{O}_{4}}\] |
| B. | \[CHC{{l}_{3}}/NaOH\] |
| C. | \[C{{O}_{2}},NaOH\] |
| D. | \[CC{{l}_{4}}/NaOH\] |
| Answer» C. \[C{{O}_{2}},NaOH\] | |
| 775. |
In the Victor-Meyer's test, the colour given by \[1{}^\circ ,2{}^\circ \] and \[3{}^\circ \] alcohols are respectively: |
| A. | Red, colourless, blue |
| B. | Red, blue, colourless |
| C. | Colourless, red, blue |
| D. | Red, blue, violet |
| Answer» C. Colourless, red, blue | |
| 776. |
\[{{H}_{2}}C=CH-C{{H}_{2}}-C{{H}_{2}}-\underset{OH}{\mathop{\underset{|}{\mathop{C}}\,}}\,H-C{{H}_{3}}\] \[\xrightarrow[Pyridine]{SOC{{l}_{2}}}(A)\xrightarrow[({{H}_{2}}O)]{{{O}_{3}}/Zn}\underset{{{C}_{5}}{{H}_{9}}ClO}{\mathop{(B)}}\,\xrightarrow{NaB{{H}_{4}}}(C)\] Compound (C) is |
| A. | \[C{{H}_{3}}-\overset{OH}{\mathop{\overset{|}{\mathop{C}}\,}}\,H-C{{H}_{2}}-\underset{Cl}{\mathop{\underset{|}{\mathop{C}}\,}}\,H-C{{H}_{3}}\] |
| B. | \[HOC{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-Cl\] |
| C. | \[HO-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-\overset{Cl}{\mathop{\overset{|}{\mathop{C}}\,}}\,H-C{{H}_{3}}\] |
| D. | \[HO-C{{H}_{2}}-C{{H}_{2}}-\underset{Cl}{\mathop{\underset{|}{\mathop{C}}\,}}\,H-C{{H}_{2}}-C{{H}_{3}}\] |
| Answer» D. \[HO-C{{H}_{2}}-C{{H}_{2}}-\underset{Cl}{\mathop{\underset{|}{\mathop{C}}\,}}\,H-C{{H}_{2}}-C{{H}_{3}}\] | |
| 777. |
\[C{{H}_{3}}-CH=C{{H}_{2}}\xrightarrow[(ii)\,NaB{{H}_{4}}]{(i)\,Hg{{(OAc)}_{2}}/{{H}_{2}}O}X+Na\] \[\xrightarrow{{}}Y+C{{H}_{3}}Cl\xrightarrow{{}}Z+HI\xrightarrow{0{}^\circ C}A+B\] What are A and B? |
| A. | \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-OH\And C{{H}_{3}}I\] |
| B. | \[C{{H}_{3}}-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,H-OH\And C{{H}_{3}}I\] |
| C. | \[C{{H}_{3}}-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,H-I\And C{{H}_{3}}OH\] |
| D. | \[C{{H}_{3}}-C{{H}_{2}}C{{H}_{2}}I\And C{{H}_{3}}OH\] |
| Answer» E. | |
| 778. |
\[C{{H}_{3}}\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,H-CH=C{{H}_{2}}\] \[\xrightarrow[(ii)\,{{H}_{2}}{{O}_{2}}/O{{H}^{-}}]{(i)\,{{B}_{2}}{{H}_{6}}}X\xrightarrow[140{}^\circ C]{{{H}_{2}}S{{O}_{4}}}Y.\] What is Y? |
| A. | \[C{{H}_{3}}-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,H-C{{H}_{2}}-C{{H}_{2}}-O-\] \[C{{H}_{2}}-C{{H}_{2}}-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,H-C{{H}_{3}}\] |
| B. | \[C{{H}_{3}}-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,H-CH=C{{H}_{2}}\] |
| C. | \[C{{H}_{3}}-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,H-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,H-O-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,H-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,H-C{{H}_{3}}\] |
| D. | \[C{{H}_{3}}-\underset{{}}{\mathop{\overset{C{{H}_{3}}}{\mathop{\overset{|}{\mathop{\underset{{{C}_{2}}{{H}_{5}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,}}\,}}\,}}\,-O-\overset{C{{H}_{3}}}{\mathop{\overset{|}{\mathop{\underset{{{C}_{2}}{{H}_{5}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,}}\,}}\,H-C{{H}_{3}}\] |
| Answer» B. \[C{{H}_{3}}-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,H-CH=C{{H}_{2}}\] | |
| 779. |
Diols (I-IV) which react with \[Cr{{O}_{3}}\] in aqueous \[{{H}_{2}}S{{O}_{4}}\] and yield products that readily under go dercarboxylation on heating, are: (I) (II) (III) (IV) |
| A. | I and II |
| B. | II and III |
| C. | II and IV |
| D. | I and IV |
| Answer» D. I and IV | |
| 780. |
An organic compound A reacts with methyl magnesium iodide to form an addition product which on hydrolysis forms the compound B. Compound B gives blue colour salt in Victor Meyer's test. The compounds A and B are respectively |
| A. | acetaldehyde, tertiary butyl alcohol |
| B. | acetaldehyde, ethyl alcohol |
| C. | acetaldehyde, isopropyl alcohol |
| D. | acetone, isopropyl alcohol |
| Answer» D. acetone, isopropyl alcohol | |
| 781. |
In the following reaction. \[{{C}_{2}}{{H}_{5}}O{{C}_{2}}{{H}_{5}}+4H\xrightarrow{Red\,P+HI}2X+{{H}_{2}}O;\] X is |
| A. | ethane |
| B. | ethylene |
| C. | butane |
| D. | propane |
| Answer» B. ethylene | |
| 782. |
Which of the following reagents would carry out the following transformation? \[(D{{=}^{2}}H)\] |
| A. | \[NaB{{D}_{4}}\] in \[C{{H}_{3}}OH\] |
| B. | \[LiAl{{H}_{4}}\] then \[{{D}_{2}}O\] |
| C. | \[NaB{{D}_{4}}\] in \[C{{H}_{3}}OD\] |
| D. | \[LiAl{{D}_{4}}\] then \[{{D}_{2}}O\] |
| Answer» B. \[LiAl{{H}_{4}}\] then \[{{D}_{2}}O\] | |
| 783. |
What is the product of the following sequence of reactions? \[{{\left( C{{H}_{3}} \right)}_{2}}C=CH.C{{H}_{2}}C{{H}_{3}}~\xrightarrow[(ii)\,{{H}_{2}}{{O}_{2}},O{{H}^{-}}]{\left( i \right)B{{H}_{3}}/THF}\] \[\xrightarrow[C{{H}_{2}}C{{l}_{2}}]{PCC}\,\,\xrightarrow[(ii)\,{{H}_{3}}{{O}^{+}}]{(i)\,C{{H}_{3}}MgBr}\] |
| A. | 2, 4- dimethyl - 3 - pentanol |
| B. | 2, 3- dimethyl - 3 - pentanol |
| C. | 2, 3 - dimethyl - 2 - pentanol |
| D. | 2, 2- dimethyl - 3 - pentanol |
| Answer» C. 2, 3 - dimethyl - 2 - pentanol | |
| 784. |
Which of the following synthesis gives 3 -methyl. 1- hexanol? |
| A. | 2- bromohexane \[\xrightarrow[{{C}_{2}}{{H}_{5}}O{{C}_{2}}{{H}_{5}}]{Mg}\,\,\xrightarrow[(ii)\,{{H}_{3}}{{O}^{+}}]{(i)\,{{H}_{2}}C=\,O}\] |
| B. | 2- bromopentane \[\xrightarrow[{{C}_{2}}{{H}_{5}}O{{C}_{2}}{{H}_{5}}]{Mg}\] |
| C. | 3- bromopantane \[\xrightarrow[{{C}_{2}}{{H}_{5}}O{{C}_{2}}{{H}_{5}}]{Mg}\] \[\xrightarrow[(ii)\,{{H}_{3}}{{O}^{+}}]{(i)\,C{{H}_{3}}CH=O}\] |
| D. | 1- bromobutane \[\xrightarrow[{{C}_{2}}{{H}_{5}}O{{C}_{2}}{{H}_{5}}]{Mg}\] \[\xrightarrow[(ii)\,{{H}_{3}}{{O}^{+}}]{(i)\,C{{H}_{3}}COC{{H}_{3}}}\] |
| Answer» C. 3- bromopantane \[\xrightarrow[{{C}_{2}}{{H}_{5}}O{{C}_{2}}{{H}_{5}}]{Mg}\] \[\xrightarrow[(ii)\,{{H}_{3}}{{O}^{+}}]{(i)\,C{{H}_{3}}CH=O}\] | |
| 785. |
Which of the following is not true in case of reaction with heated copper at \[300{}^\circ C\]? |
| A. | Phenol \[\xrightarrow{{}}\] Benzyl alcohol |
| B. | Primary alcohol\[\xrightarrow{{}}\] Aldehyde |
| C. | Secondary alcohol \[\xrightarrow{{}}\] Ketone |
| D. | Tertiary alcohol \[\xrightarrow{{}}\] Olefin |
| Answer» B. Primary alcohol\[\xrightarrow{{}}\] Aldehyde | |
| 786. |
Which of the following reactions will not result in the formation of anisole? |
| A. | Phenol + dimethyl sulphate in presence of a base |
| B. | Sodium phenoxide is treated with methyl iodide |
| C. | Reaction of diazomethane with phenol |
| D. | Reaction of methylmagnesium iodide with phenol |
| Answer» E. | |
| 787. |
An aromatic ether is not cleaved by HI even at 525 K. The compound is |
| A. | \[{{C}_{6}}{{H}_{5}}OC{{H}_{3}}\] |
| B. | \[{{C}_{6}}{{H}_{5}}O{{C}_{6}}{{H}_{5}}\] |
| C. | \[{{C}_{6}}{{H}_{5}}O{{C}_{3}}{{H}_{7}}\] |
| D. | Tetrahydrofuran |
| Answer» C. \[{{C}_{6}}{{H}_{5}}O{{C}_{3}}{{H}_{7}}\] | |
| 788. |
Give the best conditions for this transformation: |
| A. | \[C{{H}_{3}}OH,{{H}^{+}}\](cat),heat |
| B. | \[{{H}_{2}}O,{{H}^{+}}\] (cat), heat |
| C. | Mg, ether, \[C{{H}_{3}}OH\] |
| D. | \[SOC{{l}_{2}},C{{H}_{3}}OH\] |
| Answer» B. \[{{H}_{2}}O,{{H}^{+}}\] (cat), heat | |
| 789. |
Diethyl ether reacts, inspite of its usual inert nature, with: |
| A. | Dilute suphuric acid |
| B. | Dilute sodium hydroxide |
| C. | Boron trifluoride |
| D. | Metallic sodium |
| Answer» D. Metallic sodium | |
| 790. |
Find missing reagents. |
| A. | \[x=LiAl{{H}_{4}},y=NaB{{H}_{4}}\] |
| B. | \[x=LiAl{{H}_{4}}/AlC{{l}_{3}},y=Lial{{H}_{4}}\] |
| C. | \[x=LiAl{{H}_{4}},y=LiAl{{H}_{4}}/AlC{{l}_{3}}\] |
| D. | \[x={{H}_{2}}/Ni,y={{H}_{2}}/Pt\] |
| Answer» D. \[x={{H}_{2}}/Ni,y={{H}_{2}}/Pt\] | |
| 791. |
Identify X in the following sequence: \[\underset{(X)}{\mathop{{{C}_{3}}{{H}_{8}}O}}\,\xrightarrow[{{H}_{2}}S{{O}_{4}}]{{{K}_{2}}C{{r}_{2}}{{O}_{7}}}{{C}_{3}}{{H}_{6}}O\xrightarrow[{{I}_{2}}+NaOH]{warn}CH{{I}_{3}}\] |
| A. | \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}OH\] |
| B. | \[C{{H}_{3}}CH(OH)C{{H}_{3}}\] |
| C. | \[C{{H}_{3}}OC{{H}_{2}}C{{H}_{3}}\] |
| D. | \[C{{H}_{3}}C{{H}_{2}}CHO\] |
| Answer» C. \[C{{H}_{3}}OC{{H}_{2}}C{{H}_{3}}\] | |
| 792. |
What amount of bromine will be required to convert 2g of phenol into 2,4,6-tribromophenol? |
| A. | 4.0 |
| B. | 6.0 |
| C. | 10.22 |
| D. | 20.44 |
| Answer» D. 20.44 | |
| 793. |
What is the major product 6f the following reaction? \[C{{H}_{3}}-\overset{OH}{\mathop{\overset{|}{\mathop{C}}\,}}\,H-C{{H}_{2}}-C{{H}_{2}}-OH\] \[\xrightarrow[\operatorname{Pyridine}\,cold]{Cr{{O}_{3}}}\Pr oduct\] |
| A. | \[C{{H}_{3}}-\overset{OH}{\mathop{\overset{|}{\mathop{C}}\,}}\,H-C{{H}_{2}}-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-H\] |
| B. | \[C{{H}_{3}}-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-C{{H}_{2}}-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-H\] |
| C. | \[C{{H}_{3}}-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-C{{H}_{2}}-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-OH\] |
| D. | \[C{{H}_{3}}-\overset{OH}{\mathop{\overset{|}{\mathop{C}}\,}}\,H-C{{H}_{2}}-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-OH\] |
| Answer» C. \[C{{H}_{3}}-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-C{{H}_{2}}-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-OH\] | |
| 794. |
What is X in the following reaction? |
| A. | \[C{{H}_{3}}OH,{{H}_{2}}S{{O}_{4}}\] |
| B. | \[C{{H}_{3}}OH,C{{H}_{3}}{{O}^{-}}\overset{+}{\mathop{N}}\,a\] |
| C. | \[{{H}_{2}}O/{{H}_{2}}S{{O}_{4}}\] followed by \[C{{H}_{3}}OH\] |
| D. | \[C{{H}_{3}}MgBr\]/ ether followed by \[{{H}_{3}}{{O}^{+}}\] |
| Answer» B. \[C{{H}_{3}}OH,C{{H}_{3}}{{O}^{-}}\overset{+}{\mathop{N}}\,a\] | |
| 795. |
To prepare 3-ethylpentan-3-ol, the reagents needed are: |
| A. | \[C{{H}_{3}}C{{H}_{2}}MgBr+C{{H}_{3}}COC{{H}_{2}}C{{H}_{3}}\] |
| B. | \[C{{H}_{3}}MgBr+C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}COC{{H}_{2}}C{{H}_{3}}\] |
| C. | \[C{{H}_{3}}C{{H}_{2}}MgBr+C{{H}_{3}}C{{H}_{2}}COC{{H}_{2}}C{{H}_{3}}\] |
| D. | \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}MgBr+C{{H}_{3}}COC{{H}_{2}}C{{H}_{3}}\] |
| Answer» D. \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}MgBr+C{{H}_{3}}COC{{H}_{2}}C{{H}_{3}}\] | |
| 796. |
How many isomers of \[{{C}_{5}}{{H}_{11}}OH\] will be primary alcohols? |
| A. | 5 |
| B. | 4 |
| C. | 2 |
| D. | 3 |
| Answer» C. 2 | |
| 797. |
Phenol on heating with \[CHC{{l}_{3}}\] and \[NaOH\] gives salicylaldehyde. The reaction is called: |
| A. | Reimer - Tiemann reaction |
| B. | Claisen reaction |
| C. | Cannizzaro's reaction |
| D. | Hell - Volhard - Zeiinsky reaction |
| Answer» B. Claisen reaction | |
| 798. |
Which is the best reagent to convert isopropyl alcohol to isopropyl bromide? \[C{{H}_{3}}-\overset{C{{H}_{3}}}{\mathop{\overset{|}{\mathop{C}}\,}}\,H-OH\xrightarrow{?}C{{H}_{3}}-\overset{C{{H}_{3}}}{\mathop{\overset{|}{\mathop{C}}\,}}\,H-Br\] |
| A. | \[HBr\] |
| B. | \[SOB{{r}_{2}}\] |
| C. | \[B{{r}_{2}}\] |
| D. | \[C{{H}_{3}}MgBr\] |
| Answer» C. \[B{{r}_{2}}\] | |
| 799. |
Williamson synthesis of ether is an example of: |
| A. | Nucleophilic addition |
| B. | Electrophilic addition |
| C. | Electrophilic substitution |
| D. | Nucleophilic substitution |
| Answer» E. | |
| 800. |
Which one of the following substituents at para- position is most effective in stabilizing the Product of the reaction is: |
| A. | \[-C{{H}_{3}}\] |
| B. | \[-OC{{H}_{3}}\] |
| C. | \[-COC{{H}_{3}}\] |
| D. | \[-C{{H}_{2}}OH\] |
| Answer» D. \[-C{{H}_{2}}OH\] | |