Structure of Carbocation

Q. which of the following is more stable? 1. benzyl carbocation or allylic carbocation 2.benzyl carboanion or allylic carboanion 3. benzyl radicle or allylic radicl

Q. 3. Which of following is the most stable carbocation ? A CH3-CH(+)-CN B CH3-CH(+)-OCH3 C CH3-CH(+)-NO2 D CH3-CH(+)-CH3

Q. The equilibrium constant for the following reaction is:

1. Less than 1
2. More than 1
3. Equal to 1
4. Cannot be predicted

Q. Which of the following carbocations can undergo a rearrangement to form relatively more stable carbocation?

1. 
2. 
3. 
4. 

Q. Which of the following is true regarding a carbocation intermediate?

1. It is $s{p}^3$ hybridised and has a tetrahedral shape
2. It is $s{p}^2$ hybridised and has trigonal planar shape
3. It is $sp$ hybridised and has a linear shape.
4. It has a half filled p-orbital

Q. Carbocations showing aromatic behaviour are exceptionally more stable. But why not phenyl carbocations ( which is highly unstable - do not exist )

Q. Which of the following holds true with regard to the order of stability?

1. 
2. 
3. 
4.