Question

$\underset{a}{C{H}_3}-\underset{b}{C{H}_2}-\underset{c}{C{H}_2}-\underset{d}{C}{H}_2-F$
Arrange the hydrogens $a,b,c,d,$ in decreasing order of their reactivities towards chlorination:

• A. $a>b>c>d$
• B. $b>c>d>a$
• C. $b>c>a>d$
• D. $c>b>a>d$

Answer 1

The correct option is C $b>c>a>d$

Among all of them hydrogen 'b' will be most leachive towards chlorination as it is $2^o$ hydrogen and it will get less electronegativity of fluorine atom and 'd' will be least stable as it is adjacent to the fluorine atom and does not have $3^o-2^o$ hydrogen.