Find total isomer obtained by dichlorination of n-butane

Find total isomer obtained by dichlorination of cyctopentane ?

Find the total isomer obtained by trichlorination of propane.

The numberof all possible products excluding stereoisomers obtained on monochlorination of n-butane and iso-butane are respectively

Given the total number of isomers, including stereoisomers, obtained on dichlorination of paropane.

Given the total number of isomers, including stereoisomers, obtained on dichlorination of paropane.

How many monochlorobutane is obtained on chlorination of n-butane ?