I. their density A) CCl4 B) CHCl3 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              c) B A 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).