Q1. Give a simple test to
distinguish between the following:
(i). Alkanes & alkenes
(ethane and ethene) (Baeyer’s
unsaturation test; BUT)
(ii) Alkenes & Alkynes
(Ethene
and ethyne) (Substitution
reaction of ethyne)
Q2. Give three methods of
preparations for ethylene.
Q3. What alkyl halide would
yield following alkenes upon dehydrohalogentaion by strong base?
(i) 2-butene (2-bromobutane)
(ii) 1-butene (1-bromobutane)
(iii) isobutylene
(1-bromo-2-methylpropane)
Q4. State Markonokoff’s rule.
Give its two applications in alkenes and alkynes.
Q5. Write
the preparation of the following:
(i) Preparation of ethene from alcohol or vicinal dihalide
(Dehydration,
dehalogenation)
(ii) Preparation of mustard gas from ethene.
(Reaction
with S2Cl2)
(iii) Preparation
of glycol from propene (Hydroxylation)
(iv) Preparation of alkane from alkene (Catalytic hydrogenation)
Q6. What happens when?
(i) Ethene or propene reacts with acidified water.
(Catalytic hydration into alcohol)
(ii) Ethene reacts with alkaline KMnO4. (Oxidation/hydroxylation
into diol)
(iii) Propene reacts with Chlorine. (Halogenation)
(iv) Propene reacts with
water. (Hydration)
(v) Ethene reacts with
bromine water (Hypobromous
acid). [Halohydrination)
(vi)Propene is treated with
Hydrogen Iodide. (Hydrohalogenation)
(vii)1,2-dibromopropane is heated with zinc (dehydrohalogenation)
(viii) Ethyl hydrogensulphate is hydrolyze (Hydrolysis)
Q7. How will you obtain the
following?
(i) Isobutylene from
alcohol [Dehydration]
(ii) isopropyl bromide from
propene [Hydrohalogenation]
(iii)1,2-dibromethane from
ethene [Halogenation]
(iv) Ethyl hydrogensulphate from ethene [Addition of
sulphuric acid]
(v) Propene
from isopropyl chloride [Dehydrohalogenation]
Q8. Describe general pattern of mechanism of electrophilic addition
reactions with specific example of hydration and Hydrohalogenation.
Q9. Complete and balance the following
reactions:
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