Give the name of the catalyst used in Friedel-Crafts reaction. 

Name one reagent that is used to convert alcohols into chloroalkanes.

What is Wurtz reaction?

115.

Arrange the following halides in order of increasing S_N2 reactivity:
CH₃Cl, CH₃Br, CH₃CH₂Cl, (CH₃)₂CHCl.

Write the various structures of C₇H₇Cl containing benzene ring. Which of these has the weakest C—Cl bond?

Identify the products A, B and C in the following:

Give chemical equation for the reaction by which propene can be obtained from 1-bromopane.

Write the structure of all the possible isomes of dichloro ethene. Which of these will have zero dipole moment?