stability of carbocations

Compare the stability of carbocation

The lowest stability of carbocation is in the compound

Which of the following is correct order of stability of carbocation?

why stability of carbocation follow the order:tertiary>secondary> primary?

Choose the correct order of stability of carbocation using concept of hyperconjugation

Assertion: The reactivity order for S_(N)1 reation is Ar_(3)CXgtAr_(2)CHXgtArCH_(2)X Reason: More is the stability of carbocation more readily moment than cis 2-chloro propene . Reason: More is stability of carbocation more readily it is formed .

Assertion (A) : SN^(1) reaction is carried out in the presence of a plar protic solvent. Reason (R): A polar protic solvent increases the stability of carbocation due to solvation.