MCQOPTIONS
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MCQOPTIONS
This section includes 33 Mcqs, each offering curated multiple-choice questions to sharpen your Haloalkanes and Haloarenes knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following is the most reactive towards nucleophilic substitution reaction? |
| A. | ClCH2 CH = CH2 |
| B. | CH2 = CH-Cl |
| C. | CH3CH = CH-Cl |
| D. | C6H6Cl |
| Answer» B. CH2 = CH-Cl | |
| 2. |
Grignard reagents are formed by the reaction of alkyl halides by warming |
| A. | with alcoholic solution |
| B. | with MgCl2 |
| C. | Mg in presence of dry ether |
| D. | with MgCO3 |
| Answer» D. with MgCO3 | |
| 3. |
An alkyl halide, RX reacts with KCN to given propane nitrile, RX is |
| A. | C3H7Br |
| B. | C4H9Br |
| C. | C2H5Br |
| D. | C5H11Br |
| Answer» D. C5H11Br | |
| 4. |
A mixture of 1-chloropropane and 2-chloropropane when treated with alcoholic KOH gives |
| A. | prop-1-ene |
| B. | prop-2-ene |
| C. | a mixture of prop-1 -ene and prop-2-ene |
| D. | propanol |
| Answer» B. prop-2-ene | |
| 5. |
In SN2 reactions with the sequence of bond breaking and bond formation is as follows |
| A. | bond breaking is followed by formation |
| B. | bond formation is followed by breaking |
| C. | bond breaking and formation are simultaneously |
| D. | bond breaking and formation take place randomly |
| Answer» D. bond breaking and formation take place randomly | |
| 6. |
The alkyl halide is converted into an alcohol by |
| A. | elimination |
| B. | dehydrohalogenation |
| C. | addition |
| D. | substitution |
| Answer» E. | |
| 7. |
Methyl bromide reacts with AgF to give methyl fluoride and silver bromide. This reaction is called |
| A. | Fittig reaction |
| B. | Swarts reaction |
| C. | Wurtz reaction |
| D. | Finkelstein reaction |
| Answer» C. Wurtz reaction | |
| 8. |
Butane nitrile can be prepard by heating. |
| A. | propyl alcohol with KCN |
| B. | butyl chloride with KCN |
| C. | butyl alcohol with KCN |
| D. | propyl chloride with KCN |
| Answer» E. | |
| 9. |
Organic compound must contain an element |
| A. | oxygen |
| B. | carbon |
| C. | hydrogen |
| D. | nitrogen |
| Answer» C. hydrogen | |
| 10. |
Good conductor of electricity and heat is |
| A. | Anthracite coke |
| B. | Diamond |
| C. | Graphite |
| D. | Charcoal |
| Answer» D. Charcoal | |
| 11. |
Which of the following compounds can yield only one monochlorinafed product upon free radical chlorination? |
| A. | 2, 2-Dimethylpropane |
| B. | 2-Methylpropane |
| C. | 2-Methylbutane |
| D. | n-Butane |
| Answer» B. 2-Methylpropane | |
| 12. |
The hybridisation of carbon in diamond is |
| A. | sp3 |
| B. | sp2 |
| C. | sp |
| D. | dsp2 |
| Answer» B. sp2 | |
| 13. |
In which of the following allotropes of carbon, percentage of carbon is maximum? |
| A. | Wood charcoal |
| B. | Coconut charcoal |
| C. | Graphite |
| D. | None of these |
| Answer» D. None of these | |
| 14. |
Ethyl alcohol is obtained when ethyl chloride is boiled with |
| A. | alcoholic KOH |
| B. | aqueous KOH |
| C. | water |
| D. | aqueous KMnO4 |
| Answer» C. water | |
| 15. |
The negative part of the addendum (the molecule to be added) adds on the carbon atom of the double bond containing the least number of hydrogen atoms. This rule is known as |
| A. | Saytzeffs rule |
| B. | Peroxide rule |
| C. | Markovnikov s rule |
| D. | van t hoff rule |
| Answer» D. van t hoff rule | |
| 16. |
Criteria for purity of organic solid is |
| A. | boiling point |
| B. | melting point |
| C. | specific gravity |
| D. | none of these |
| Answer» C. specific gravity | |
| 17. |
Which of the following is not correctly matched with its IUPAC name? |
| A. | CHF2CBrClF : 1-Bromo-1-chIoro-1, 2, 2-trifluoroethane |
| B. | (CCl3)3CCl : 2-(Trichloromethyl)-1, 1, 2, 3, 3-heptachloropropane |
| C. | CH3C (p-ClC6H4)2CH(Br)CH3 : 2-Bromo-3, 3-bis (4- chlorophenyl) butane |
| D. | o-BrC6H4CH (CH3) CH2CH3 : 2-Bromo-l- methylpropylbenzene |
| Answer» C. CH3C (p-ClC6H4)2CH(Br)CH3 : 2-Bromo-3, 3-bis (4- chlorophenyl) butane | |
| 18. |
Number of bonds in ethyne is |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 19. |
The compound having general formula CnH2n+2 is |
| A. | Alkene |
| B. | Alkyne |
| C. | Alkane |
| D. | none of these |
| Answer» D. none of these | |
| 20. |
General formula of Alkene is |
| A. | CnH2n |
| B. | CnH2n+2 |
| C. | CnH2n-2 |
| D. | none of these |
| Answer» B. CnH2n+2 | |
| 21. |
Valency of carbon is |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» E. | |
| 22. |
Single bond length between carbon-carbon is |
| A. | 1.34 |
| B. | 1.20 |
| C. | 1.54 |
| D. | none of these |
| Answer» D. none of these | |
| 23. |
Alkene gives which of the following reactions? |
| A. | Addition reaction |
| B. | Substitution reaction |
| C. | Both (a) and (b) |
| D. | None of these |
| Answer» D. None of these | |
| 24. |
Which of the following molecules has highest dipole moment? |
| A. | CH3Cl |
| B. | CH2Cl2 |
| C. | CHCl5 |
| D. | CCl4 |
| Answer» B. CH2Cl2 | |
| 25. |
Which of the following compounds will have highest melting point? |
| A. | Chlorobenzene |
| B. | o-Dichlorobenzene |
| C. | m-Dichlorobenzene |
| D. | p-Dichlorobenzene |
| Answer» E. | |
| 26. |
Arrange the following compounds in-decreasing order of their boiling points (i) CH3Br (ii) CH3CH2Br (iii) CH3CH2CH2Br (iv) CH2CH2CH2CH2Br |
| A. | (i) > (ii) > (iii) > (iv) |
| B. | (iv) > (iii) > (ii) > (i) |
| C. | (i) > (iii) > (ii) > (iv) |
| D. | (iii) > (iv) > (i) > (ii) |
| Answer» C. (i) > (iii) > (ii) > (iv) | |
| 27. |
Which one of the following is not correct order of boiling .points of the alkyl/aryl halides? |
| A. | CHCl3 > CH2Cl2 |
| B. | CH3(CH2)3CI > CH3(CH2)2Cl |
| C. | (CH3)3CCl > (CH3)2CHCH2Cl |
| D. | CH3(CH2)3Cl > CH3CH2CHClCH3 |
| Answer» D. CH3(CH2)3Cl > CH3CH2CHClCH3 | |
| 28. |
Alkyl halides are immiscible in water though they are polar because |
| A. | they react with water to give alcohols |
| B. | they cannot form hydrogen bonds with water |
| C. | C -X bond cannot be broken easily |
| D. | they are stable compounds and are not reactive |
| Answer» C. C -X bond cannot be broken easily | |
| 29. |
Which of the following compounds has the highest boiling point? |
| A. | CH3CH2CH2Cl |
| B. | CH3CH2CH2CH2Cl |
| C. | CH3CH(CH3)CH2Cl |
| D. | (CH3)3CCl |
| Answer» C. CH3CH(CH3)CH2Cl | |
| 30. |
The reaction of toluene with chlorine in presence of FeCl3 gives predominantly. |
| A. | amixture of o-and p-chlorotoluene |
| B. | benzyl chloride |
| C. | m-chlorotuluene |
| D. | benzoyl chloride |
| Answer» B. benzyl chloride | |
| 31. |
Which of the following reactions follows Markovnikov s rule? |
| A. | C2H4 + HBr |
| B. | C3H6 + Cl6 |
| C. | C3H6 + HBr |
| D. | C3H6 + Br2 |
| Answer» D. C3H6 + Br2 | |
| 32. |
Bromination of methane in presence of sunlight is a |
| A. | nucleophilic substitution |
| B. | free radical substitution |
| C. | electrophilic substitution |
| D. | nucleophilic addition |
| Answer» C. electrophilic substitution | |
| 33. |
Which of the following alkyl halides undergoes hydrolysis with aqueous KOH at the fastest rate? |
| A. | CH3CH2CH2Cl |
| B. | CH3CH2Cl |
| C. | CH3CH2CH2CH2Cl |
| D. | CH3CH2CH (Br) CH3 |
| Answer» E. | |