Arrange the three isomeric pentanes in order of increasing stability at room temperature

CBSE Class 11 CBSE Class 11 Chemistry
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1

(i) Arrange the three isomeric pentanes in order of increasing stability at room temperature,
(ii) Give a method of preparation of propane from (a) an alkene (6) an alkyl halide.
(iii) Write the structure of all the alkenes that can be hydrogenated to form 2-methyl butane, (zv) Why is light or heat necessary to initiate the chlorination reaction?

2

(i) The stability of structural isomers generally increases with increasing branching. Thus,

The stability of structural isomers generally increases with increasing branching..png899×187 14.3 KB

The stability of structural isomers generally increases with increasing branching.png970×231 16.8 KB

(iv) The Cl—Cl bond must be broken to form Cl radical before the reaction with methane. This homolysis requires energy, which is supplied either by heat or light.