Sarthak Shakya

The compound having the molecular formula C3
H
7Br will have two different structural isomers which are 1-bromopropane and 2-bromopropane.

Conversion:

Nitrite ion is an ambident nucleophile because it has two sites — oxygen and nitrogen — through which attack can take place.Potassium nitrite (KNO₂) is predominantly ionic and one of the oxygen atoms has a negative charge (O=NOK⁺). Nucleophilic attack through this negatively charged oxygen atom mainly gives alkyl nitrite.

Silver nitrite (AgNO₂), on the other hand, is predominantly covalent and both oxygen and nitrogen atoms have lone pair of electrons. Since nitrogen is less electronegative...

In an aqueous solution, KOH ionises completely to give OH ^- ions. OH ^- ion is a strong nucleophile, causing alkyl chloride to undergo a substitution reaction to form alcohol.

Whereas Alcoholic KOH is a strong base so it can abstract a hydrogen from the β-carbon of the alkyl chloride and form an alkene by eliminating a molecule of HCl. 

1. Direct fluorination of alkanes is highly exothermic and explosive making it difficult to control.
 2.Direct iodination of alkanes is highly reversible and difficult to carry out.

3. In direct chlorination and bromination, the reaction can lead to different isomeric monohalogenated alkanes (alkyl halides) as well as polyhalogenated alkanes.

Hence, halogenation of alkanes is not a good method of preparation of alkyl halides.