HALO ALKANES AND HALO ARENES
1. What is meant by chirality of a compound? Give an example.
2. Which of the following is easily hydrolysed by KOH and why? CH3CHClCH2CH3 or CH3CH2CH2Cl
3. Write a chemical test to distinguish between chlorobenzene and benzyl chloride and between chloroform and carbon tetra chloride?
4. Why n\methyl chloride is more easily hydrolysed than chlorobenzene?
5.Which compound in the following couples will react faster towards SN2 displacement and why ?
(a) 1.bromopentane or 2-bromopentane, (b) 1-bromo-2-methylbutane or 2-bromo-2-methylbutane.
6.give one use each of DDT and Iodoform?
7. Draw the structure of the folloeing compounds: 4-bromo-3-methylpet-2-ene , 4-ter.butyl-3-iodoheptane, 1-chloro-4-ethylcyclohexane, 1-chloro-2,2-dimethylpropane.
8. How do you distinguish between SN1 and SN2 reaction mechanisms? Give one example each.
9. Suggest a possible reason for the following observatins:
a. the order of reactivity of haloalkanes is RI>RCl> RBr.
b. neopentyl chloride does not follow SN2 mahanism.
c. haloalkanes easily dissolve in organic solvents.
10. What is known as racemic mixture? Give an example.
11. Complete the following reactions:
a. C6H5N2Cl + H3PO2 + H2O---------------
b. cyclohexanol + SOCl2-----------------
c. 1-methylcyclohexene + HI--------------
12. Although chlorine is an electron withdrawing group , yet it is ortho-para directing in electrophilic substitution reactins of aromatic compounds. Expain?
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