Is it permissible for one to give the Zakah (obligatory charity) to his indebted brother?
                                It is permissible for one to give the Zakah to his brother if he was indebted, or poor.
                             
                        
                            
                                
                                Is it permissible for the mother to give her children from the Zakah (obligatory charity) of her money?
                                It is permissible for the mother to give her children from the Zakah of her money if they are Zakah-eligible recipients, and she isn`t obliged to provide for them.
                             
                        
                            
                                
                                Is it permissible for a woman to adorn herself with kohl (eyeliner) and go out wearing it?
                                Kohl is a form of adornment, and it is forbidden for a woman to display her adornment to anyone other than her husband or a Mahram. And Allah Knows Best.
                             
                        
                            
                                
                                Is it permissible for a girl to wear colored contact lenses?
                                All Perfect Praise is due to Allah, The Lord of The Worlds.
Wearing colored contact lenses for medical treatment is permissible, and wearing them as an adornment is also permissible, provided that she isn`t seen while having them on by non-Mahrams. And Alalh Knows Best.