Haloalkanes & Haloarenes

Haloalkanes & Haloarenes
Class:XII / Unit:10

1. Which of the following compounds will have highest melting point?

Chlorobenzene
p-Dichlorobenzene
m-Dichlorobenzene
o-Dichlorobenzene

2. Ethyl alcohol is obtained when ethyl chloride is boiled with

aqueous KOH
water
aqueous KMnO₄
alcoholic KOH

3. Butane nitrile can be prepard by heating.

propyl alcohol with KCN
butyl chloride with KCN
butyl alcohol with KCN
propyl chloride with KCN

4. Methyl bromide reacts with AgF to give methyl fluoride and silver bromide. This reaction is called

Fittig reaction
Swarts reaction
Wurtz reaction
Finkelstein reaction

5. The alkyl halide is converted into an alcohol by

elimination
substitution
addition
dehydrohalogenation

6. A mixture of 1-chloropropane and 2-chloropropane when treated with alcoholic KOH gives

propanol
prop-1-ene
prop-2-ene
a mixture of prop-1 -ene and prop-2-ene

7. In SN₂ reactions with the sequence of bond breaking and bond formation is as follows

bond formation is followed by breaking
bond breaking is followed by formation
bond breaking and formation are simultaneously
bond breaking and formation take place randomly

8. Grignard reagents are formed by the reaction of alkyl halides by warming

with alcoholic solution
Mg in presence of dry ether
with MgCl₂
with MgCO₃

9. An alkyl halide, RX reacts with KCN to given propane nitrile, RX is

C₃H₇Br
C₂H₅Br
C₄H₉Br
C₅H₁₁Br

10. Alkyl halides are immiscible in water though they are polar because

they react with water to give alcohols
they are stable compounds and are not reactive
C -X bond cannot be broken easily
they cannot form hydrogen bonds with water