Explanation

i) P deactivated ring but electrophilic substitution occur at ortho/pera position. Deactivation occur by-1 effect of Cl
ii) `-CF_3` is meta-directing, deactivate ring by lıyperconjugation
iii) `-OCH_3` ortho/para-directing but activating group
iv) -NO ortho/para - directing but deactivating group . Deactivation occur by electron with drawing effect of `-NO` group