I. B < A < C d) C

I. Objective type
questions (MCQ)

 

 

1.
The IUPAC name of                                     is

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   a) 2-Bromo pent – 3 – ene                                   b)  4-Bromo pent – 2 – ene            

   c) 2-Bromo pent – 4 – ene                                   d) 4-Bromo
pent – 1 – ene

2.  Which of the following compounds has the
highest boiling point

     a) n-Butyl chloride                b) Isobutyl
chloride      c) t-Butyl chloride   d) n-propyl chloride

3.
Arrange the following compounds in increasing order of their density

   A) CCl4                               B) CHCl3                    C) CH2Cl2

     a) C < B < A                     b) C > B > A              c) B < A < C              d) C > A < C 4. The position of – Cl in the compound CH3 – CH = CH – Cl  is _________     a) Vinyl                              b) Allyl                      c) Secondary             d) Aralkyl 5.What should be the correct IUPAC name of diethyl chloromethane?     a) 3 – chloro pentane                               b) 1-chloropentane      c) 1-chloro-1, 1, diethyl methane                      d) 1 –chloro-1-ethyl propane 6. Which of the following molecules is chiral in nature?     a) 2 – Bromopropan – 2 –ol                   b) 2 – chloropropane    c) 1-Iodo propane                                     d) 2 – Bromo butane 7.  Carbon – chlorine bond of chloro benzene in comparision to carbon – chlorine bond is methyl     chloride is ___________     a) shorter and weaker     b) shorter and stronger         c) longer and weaker           d) longer and stronger 8. The dehydro chlorination of 2 – bromo butane gives 2 – butane . The product is     a) Markovnikov's product                                 b) Anti markovnikovs product     c) Saytzeff product                                  d) Hoff mann product       9. C X bond is strongest in     a) Chloro methane                       b) Iodo methane       c) Bromo methane    d) Fluoro methane          10.   In the reaction                 .                            X is   _________           a)                                     b)                                c)                                 d)       11. Which of the following compounds will give racemic mixture on nucleophilic substitution by        OH- ion?       i)                                                   ii)                                            iii)               a)  (i)                              b) (ii) and (iii)                                   c) (iii)                         d) (i) and (ii) 12. The treatment of RMgX with ethyl formate gives        a)                          b)                                            c) R- CHO                  d) R- O – R   13. Benzene reacts with Cl2 in the presence of FeCl3 and in absence of sunlight to form       a) Chlorobenzene                       b) Benzyl chloride   c) Benzal chloride    d)Benzene hexa chloride 14. A sample of chloroform before being used as anesthetic agent is tested by      a) cold silver nitrate solution                b) Barium chloride solution                c) Sodium hydroxide solution              d) Fehlings solution 15. The molecular formula of DDT has      a) 3 chlorine atoms                     b) 4 chlorine atoms  c) 5 chlorine atoms  d) 2 chlorine atoms 16. The name of C­2F4Cl2 is  ___________       a) Freon – 112                b) Freon – 113                      c) Freon – 114                      d) Freon – 115 17. Which of the following solvents on direct contact damages cornea?       a) Chloroform     b) Carbon tetra chloride      c) Chloro benzene    d) Methylene chloride 18. The reaction of an aromatic halogen compound with an haloalkane in the presence of sodium       and ether is called _________      a) Wurtz reaction                        b) Swarts reaction    c) Fittig reaction       d) Wurtz fitting reaction 19.Which of the following reagent is helpful to differentiate ethylene dichloride and ethylidene       chloride?       a) Zn / Methanol             b) KOH / ethanol      c) aqueous KOH       d) ZnCl2 / Con HCl 20. Match the compounds given in Column I with suitable items given in Column II        Column I (Compound)   Column II (Uses) A Iodo form 1 Fire extinguisher B Carbon tetra chloride 2 Insecticide C CFC 3 Antiseptic D DDT 4 Refrigerants Code       a) A ? 2  B ? 4 C ?1 D ?3              b) A ? 3        B ? 2 C ?4 D ?1       c) A ? 1  B ? 2 C ?3 D ?4              d) A ? 3        B ? 1 C ?4 D ?2 Assertion and Reason type questions Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choices as (i) If both assertion and reason are true and reason is the correct explanation of assertion. (ii) If both assertion and reason are true but reason is not the  correct explanation of assertion. (iii) If assertion is true but reason is false. (iv) If both assertion and reason is false.   16. Assertion :  Boiling point of alkyl halides increases with increase in molecular mass       Reason : Boiling point of alkyl  halides are in the order RI > RBr > RCl  >
RF

     a) (i)                      b)
(ii)                          c) (iii)                         d) (iv)

 

 

17.
Assertion : Treatment of
chloroethane with a saturated solution of AgCN give ethyl isocyanide
                         as the major
product.

     Reason
: Cyanide ion is an ambident nucleophile.

    a) (i)                       b)
(ii)                          c) (iii)                         d) (iv)

18.
Assertion : SN2 reaction
proceeds with inversion of configuration.

       Reason
: SN2 reactions occur in two steps.

       a) (i)                    b)
(ii)                          c) (iii)                         d) (iv)

19.
Assertion : In mono halo arenes,
electrophilic substitution occurs at ortho and para positions.

      Reason
: Halogen atom is a ring deactivator

20.
Assertion : Alkyl iodide can be
prepared by treating alkyl chloride with NaI in acetone.

     Reason
: NaCl is soluble in acetone and NaI is not.

    a) (i)                       b)
(ii)                          c) (iii)                         d) (iv)

II. Very short answer
type questions (VSA)

16.
Classify the following compounds in the form of alkyl, allylic, vinyl, benzylic
halides

      a) CH3 – CH = CH – Cl  (ii) C6H5CH2I                        (iii)                                (iv) CH2 = CH – Cl

17.
Why chlorination of methane is not possible in dark?

18.
How will you prepare n propyl iodide from n-propyl bromide?

19.
Which alkyl halide from the following pairs is chiral and undergoes faster SN2
reaction?

                                                    

20.
How does chlorobenzene react with sodium in the presence of ether? What is the
name of the
     reaction?

21.
Give reasons for polarity of C-X bond in halo alkane.

22.
Why is it necessary to avoid even traces of moisture during the use of Grignard
 reagent?

23.
What happens when acetyl chloride is treated with excess of CH3MgI?

24.
Arrange the following alkyl halide in increasing order of bond enthalpy

            CH3Br, CH3F,
CH3Cl, CH3I

25.
What happens when chloroform reacts with oxygen in the presence of sunlight?

 

 

III. Short answer type
question (SA)

26.
Write the possible isomers of C5H11Br Give their IUPAC
and common names.

27.
Mention any three methods of preparation of haloalkanes from alcohols.

28.
Compare SN1 and SN2 reaction mechanisms.

29.
State saytzeffs rule. Give example.

30.
Explicit the aromatic nucleophilic substitutions reaction of chloro benzene.

31.
Account for the following

      (i) t-butyl chloride reacts with
aqueous  KOH by SN1 mechanism
while n-butyl chloride reacts
           with SN2 mechanism.

       (ii) p-Dichloro benzene has higher
melting point than those of o-and m-dichloro benzene.

32.
Give a test to differentiate ethylidene chloride form ethylene dichloride

33.
Write a chemical reaction to prepare the following

i) Freon-12 from Carbon tetrachloride

ii) Carbon tetrachloride from carbon
disulphide

34.
What are Freon’s? Give its uses and environmental effects

35.  Predict the products when bromo ethane is
treated with the following

            i) 
                    ii)

IV.
Long answer type questions (LA)

36.Explain
the mechanism of SN1 reaction by highlighting the stereochemistry
behind it

37.Write
short notes on the the following

i) Raschig process

ii)Dows Process

iii)Darzens process

38.Starting
from CH3MgI, How will you Prepare the following ?

i)
Acetic acid                        ii)Acetone                 iii)Ethyl acetate

39.Complete
the following reactions

 

   

  

   

  

40.Explain
the preparation of the following compounds

  i)DDT                       ii)Chloroform   iii) Biphenyl

V. Organic problems

41.An
organic compound (A) with  molecular
formula C2H5­Cl reacts with aqueous KOH gives
    compounds (B) and with alcoholic KOH
gives compound (C).Identify (A),(B), and (C)

42.
Simplest alkene (A) reacts with HCl to form compound (B).Compound (B) reacts
with ammonia to form compounds (C) of molecular formula C2 H7N.Compound
(C) undergoes carbyl amine test. Identify (A),(B), and (C).