How many different structural isomers exist with the formula C5H10? (Except geometric and optical isomers) :

(A) There are five linear Isomers:

(1) Pent-1-ene (2) Pent-2-ene (3) 2-Methylbut-1-ene (4) 2-Methylbut-2-ene (5) 3-Methylbut-1-ene

(B) There are five cyclic Isomers:

(1) Cyclopentane (2) 1-Methylcyclobutane (3) 1-Ethylcyclopropane (4) 1,1-Dimethylcycloprone (5) 1,2-Dimethylcyclopropane

How many cyclic isomers possible of (C6H12) Hexene?

How many cyclic isomers possible of (C5H10) pentene?

Write the major and minor product of hydration of 1-Methylcyclopent-1-ene in acidic medium?