Is it permissible for a Muslim woman to uncover her hair in the presence of a Christian woman?
                                All perfect praise be to Allah, the Lord of the worlds. I testify that there is none worthy of worship except Allah and that Muhammad, sallallahu ‘alayhi wa sallam, is His slave and Messenger.
According to the reliable opinion of the Shafie School of Thought, this isn`t permissible. However, some scholars stated that it is permissible for a woman to uncover what she usually uncovers while doing housework, but this differs from one place to another where some women uncover their hair while some don`t. However, this is provided that a woman doesn`t uncover her hair in the presence of non-Mahram men (Men permissible for a woman to marry). And Allah The Almighty Knows Best.
                             
                        
                            
                                
                                Does Istigfar (Asking Allah for forgiveness) between the first and the second part of Friday prayer`s sermon render the prayer invalid?
                                Talking during Friday prayer`s sermon is disliked, but there is no harm in offering Istigfar between the two parts of the sermon, and it doesn`t invalidate the prayer as it is actually from Sunnah. And Allah Knows Best.
                             
                        
                            
                                
                                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.
                             
                        
                            
                                
                                What is the ruling of Sharia on transplanting kidneys bought from another country because there are no donors from amongst the relatives of the patient?
                                Praise be to Allah the Lord of the Worlds. May His peace and blessings be upon our Prophet Mohammad and upon all his family and companions.
It is forbidden to purchase human organs. And Allah The Almighty Knows Best.