Is Zakah (obligatory charity) due on articles of merchandise even if they were stacked in the merchant`s stores for years?
                                Yes, Zakah is due on goods even if they were stacked in merchant`s stores for years, in this manner Islam struggle against monopoly.
                             
                        
                            
                                
                                I suffer from excessive gas, especially when I pray, and I redo my ablution more than seven times. I have obsessive thoughts about this matter, even though I went to a doctor and was given medication that did not help. What should I do?
                                If the release of gas stops at certain times between prayers, you should wait for that time, perform ablution, and pray. However, if it is continuous, you should perform ablution after the prayer time begins and pray, and the release of gas during the prayer is excused. And Allah The Almighty Knows Best.
                             
                        
                            
                                
                                Is the father a Mahram (Non-marriageable) to his son`s mother-in-law?
                                The father is a non-Mahram (Marriageable) to his son`s mother-in-law, so it is impermissible for them to look at each other, or to have a seclusion (Khalwah).
                             
                        
                            
                                
                                I took a car from the Orphans' Fund Development Institution; is there usury (Riba) involved in this transaction?
                                If the Sharia's conditions were met, then there is no harm in this. And Allah The Exalted Knows Best.