Organic Compound containing Halogens

For all tpoics Click here

Start practice on haloform


1. Method of preparation of Alkyl Halide

1.  Which of the following halide is 2°
  1. Isobutyl chloride
  2. Isopropyl chloride
  3. n-propyl chloride
  4. n-butyl chloride
     
ans : b

2. Gem-dibromide is


     
ans :c

3. The compound that contains all the 1' , 2' , 3' , and 4' carbon atom is
  1. 2,3-dimethyl pentane
  2. 3-chloro-2,3-dimethylpentane
  3. 2,3,4-trimethylpentane
  4. 3,3-dimethylpentane
     
ans :b

4. Which of the following is a primary halide ?
  1. Neo hexyl chloride
  2. Secondary butyl iodide
  3. Tert-butyl bromide
  4. Isopropyl iodide
     
ans :a

5.  When ethyl alcohol reacts with thionyl chloride, in the presence of pyridine,the product obtained is


     
ans :a

6. A grignard's reagent may be made by reacting magnesium with
  1. Methyl amine
  2. Ethyl amine
  3. Diethyl ether
  4. Ethyl alcohol
     
ans :b

7. Propene on treatment with HBr gives
  1. Propyl bromide
  2. Isopropyl bromide
  3. 1,2-dibromoethane
  4. None of these
     
ans :b

8. Best way to prepare alkyl chloride is


     
ans :c

9. What will be the product in the following reaction


     
ans :d

10. For a given alkyl group, the densities of the halides follow the order
  1. RCl < RBr < RI
  2. RI < RCl < RBr
  3. RBr < RI < RCl
  4. RI < RBr < RCl
     
ans :a

11. 2,6-Dimethylheptane on monochlorination produces... derivatives
  1. 4
  2. 3
  3. 5
  4. 6
     
ans : a

12. Among the following , the molecule which has the highest dipole moment ?
  1. CCl4
  2. CH2Cl2
  3. CHCl3
  4. CH3Cl
     
ans :d

13. Find the product of the following reaction

find out 'B' :



     
ans :a

14.
find the structure of 'A' :


     
ans :c

15. Major product for the reaction


     
ans :d

2. Nucleophillic Substitution Reaction 

1. The reactivity of methyl chloride , propyl chloride and chlorobenzene are in which of the following  order
  1. Methyl chloride > chlorobenzene > propyl chloride
  2. Propyl chloride > methyl chloride > chlorobenzene
  3. Methyl chloride > propyl chloride > chlorobenzene
  4. Non of these
     
ans :c

2. Ethyl bromide can be converted into ethyl alcohol by 
  1. The action of moist silver oxide
  2. Boiling with an alc solution of KOH
  3. Heating with dilute hydrochloric acid and zinc
  4. none of these
     
ans :a

3. Ethyl bromide reacts with silver nitrate to form 
  1. Ethane
  2. Nitroethane and ethyl nitrite
  3. Ethyl nitrite
  4. Nitroethane
     
ans :d

4. 
Compound X and Y are



     
ans :a

5. Ethyl bromide on heating with silver cyanide forms a compound X. the functional isomer of X is

     
ans :c

6. In which of the following alkyl halide is SN2 mechanism is favoured the maximum


     
ans :d

7. Which of the following compounds does not undergo nuclephilic substitution reactions ?
  1. Benzyl chloride
  2. Ethyl bromide
  3. Vinyl chloride
  4. Isopropyl chloride
     
ans :c

8. Which of the following haloalkanes is most reactive
  1. 2-bromopropane
  2. 1-bromopropane
  3. 2-chloropropane
  4. 1-chloropropane
     
ans :a

9. Which of the following is boiled with ethyl chloride to form ethyl alcohol
  1. Alc KOH
  2. H2O
  3. Aq. KOH
  4. H2O2
     
ans :c

10. When ethyl iodide is heated with silver nitrate, the product obtained is


     
ans : b

11. In nucleophilic aliphatic substitution , the nucleophiles are generally
  1. Acids
  2. Salts
  3. Bases
  4. Neutral molecules
     
ans :c

12. When alkyl halide is heated with dry Ag2O, it produces
  1. Ester
  2. Ketone
  3. Ether 
  4. Alcohol
     
ans :c

3.Elimination reaction, Miscellaneous reaction

1. Chlorine react with ethanol to give
  1. Chloral
  2. Chloroform
  3. Acetaldehyde
  4. Ethyl chloride
     
ans :a

2. Chloroform can be obtained from
  1. Propanol-2
  2. Methanal
  3. Propanol-1
  4. Methanol
     
ans :a

3. Which of the compound does not form iodoform with alkali and iodine ?
  1. Acetone
  2. Diethyl Ketone
  3. Ethanol
  4. Isopropyl alcohol
     
ans :b

4. Full name of D.D.T is
  1. 1,1-dichloro -2, 2-diphenyl trichloroethane
  2. 1,1-dichloro-2,2-diphenyl trimethylene
  3. 1,1,1-trichloro-2,2-bis(p-chlorophenyl) ethane
  4. None of the above
     
ans :c

5. Acetone reacts with I2 in presence of NaOH to form
  1. C2H5I
  2. CHI3
  3. C2H4I2
  4. CH3I
     
ans :b

6. Which compound needs chloral in its synthesis ?
  1. Gammexane 
  2. DDT
  3. Chloroform
  4. Michler's Ketone
     
ans :b

7. Phosgene is the common name for
  1. CO2 and PH3
  2. Phosphoryl chloride
  3. Carbon tetrachloride
  4. Carbonyl chloride
     
ans :d

8. What will happen when CCl4 is treated with AgNO3
  1. CCl4 will dissolve in AgNO3
  2. Nothing will happen
  3. A white ppt. of AgCl will be formed
  4. none of above
     
ans :b

9. CCl4 cannot give precipitate with AgNO3 because of
  1. Formation of cmplex with AgNO3
  2. Chloride ion is not formed 
  3. Evolution of Cl2 gas
  4. AgNO3 does not give silver ion
     
ans :b

10. Reaction of tert-butyl bromide wuth sodium methoxide produces
  1. Isobutane
  2. Sodium tert-butoxide
  3. Isobutylene
  4. tert-butyl methyl ether
     
ans :c

11. The bad smelling substance formed by the action of alcoholic caistic potash on chloroform and aniline is
  1. Phenyl isocynate
  2. Nitrobenzene
  3. phenyl cyanide
  4. Phenyl iscocyanide
     
ans :d

12. Dehydrohalogenation of an alkyl halide is
  1. An addition reaction
  2. A substitution reaction
  3. An oxidation reaction
  4. An elimination reaction
     
ans :d

13. Alkyl halides react with Mg in dry ether to form
  1. Grignard's reagent
  2. Magnesium halide
  3. Alkene
  4. Alkyne
     
ans :a

14. When methyl bromide is heated with Zn,it gives
  1. CH4
  2. C2H4
  3. C2H6
  4. CH3OH
     
ans :c

15. Iodoform on heating with KOH gives
  1. CH3CHO
  2. HCOOK
  3. CH3COOK
  4. HCHO
     
ans :b

16. Which of the following is used in fire extinguishers
  1. CCl4
  2. CHCl3
  3. CH2Cl2
  4. CH4
     
ans :a

17. Alkyl halide can be converted into alkene by
  1. Elimination reaction
  2. Nucleophilic substitution reaction
  3. Both nucleophilic substitution and elimination reaction
  4. Rearrangement
     
ans :a

18. In Wurtz reaction alkyl halide react with
  1. Alkyl halide in ether
  2. Sodium in dry ether 
  3. Sodium only
  4. Sodium in ether
     
ans :d

19. BHC is used as
  1. Pesticide
  2. Insecticide
  3. Herbicide
  4. Weedicide
     
ans :b

4. Aryl Halide

1. benzene reacts with chlorine to form benzene hexachloride in presence of
  1. Nickel
  2. AlCl3
  3. Zinc
  4. Bright sunlight
     
ans :d

2. C6H5Cl prepared by aniline with
  1. HNO2 , and then heated with Cu2Cl2
  2. Cu2Cl2
  3. Cl2 in presence of anhydrous Alcl3
  4. HCl
     
ans :a

3. In presence of AlCl3 , benzene and n-propyl bromide react in Friedal-craft's reaction to form
  1. Isopropyl benzene
  2. 1,2-dinormal propyl benzene
  3. 1,4-dinormal propyl benzene
  4. n-propyl benzene
     
ans :a

4.
in the above reaction the product is



     
ans :d

5. What is the product formed in the following reaction ?


     
ans :c

6. Which one among following compounds has the highest dipole moment ?
  1. o-bromochlorobenzene
  2. o-dibromobenzene
  3. m-dichlorobenzene
  4. o-dichlorobenzene
     
ans :d

7. What is the major project in the folloeing reaction ?


     
ans :d

8. m-Bromotoluene is prepared by-
  1. Bromination of toluene
  2. Friedel Craft's reaction of bromobenzene with CH3Cl
  3. Bromination of nitrobenzene and subsequent  replacement of -NO2 group with methyl group
  4. Bromination of aceto-p-toluidine followed by hydrolysis and deamination
     
ans :d

9. The reaction of toluene with Cl2 in presence of FeCl3 fives 'X' and reaction in presence of light gives 'Y' Thus, 'X' and 'Y'  are :
  1. X= Benzyl chloride , Y= m -chlorotoluene
  2. X= Benzal chloride , Y = o -chlorotoluene
  3. X= m-chlorotoluene , Y = p-chlorotoluene
  4. X = o- and p -chlorotoluene, Y = TrichloromethylBenzene
     
ans :d

10. The reactivity of ethyl chloride is
  1. More or less equal to that of benzyl chloride
  2. More or less equal to that of chlorobenzene
  3. More than that of benzyl chloride
  4. Less than that of chlorobenzene
     
ans :c

11. Benzyl chloride when oxidized by Pb(NO3)2 gives
  1. Benzoic acid
  2. Benzene
  3. Benzaldehyde
  4. None
     
ans :c

12. Chlorobenzene on fusing with solid NaOH gives
  1. Benzene 
  2. Phenol
  3. Benzoic acid
  4. Benzene chloride
     
ans :b

13. Toluene reacts with excess of Cl2 in presence of sunlight to give a product that on hydrolysis followed by reaction with NaOH gives


     
ans :a
 
14. Benzene intermediate is not observed in-


     
ans :b

15. What is the product of the following reaction ?


     
ans :c

16. Product of the reaction

is:



     
ans :b

17.
The product is :


     
ans :a

Comments

Post a Comment