Why is a `3^@ ` radical more stable as compared to `1^@ ` and `2^@` free radicals?

Assertion: -The addition of HCl to unsymmetrical alkenes in the presence of organic peroxides takes place against Markownikoff's rule. Reason :- 2^@ free radicals are more stable than 1^@ free radicals.

When two free radicals collide

Assertion: Addition of HBr to propene yields 2-bromopropane but in presence of a peroxide it yields 1-bromopropane. Reason: When reaction is carried out in the presence of a peroxide it follows free radical mechanism, 2^(@) free radical is more stable than 1^(@) free radical.

Find out the planar free radical(s).

The most stable free radical is

The free radical which is most stable is

Correct stability order of the given free radicals is

Due to the presence of an unpaired electron, free radicals are

Which of the planning is incorrect about free radicals?

Free radicals can undergo