Conditions for the validity of Salaah

Q: If quarter of the Awrah is exposed for less than three subhaanAllah, is the salaah valid? 

Q: Is it haraam to pray in forbidden times? Would they be valid? What is the status of qadha prayers performed in the last 20 minutes of Asr? Are they valid and disliked?

Q: Is it permissible to perform salaah with one's sleeves folded but the sleeves don't go above the elbows? Meaning the elbows are covered but the sleeves are folded.

Q: Is it permissible to join the salaahs when a person undertakes a journey and is a musaafir? 

For example, you are leaving a country and it is zuhr time, so before the flight, you join zuhr and asr? Or you visited a country and you go to a shop and maghrib time sets in, so you read maghrib and esha together. Is this permissible, and if not, does one get a sin when they do it?

Q: Let’s say someone does wudu for each salah but intentionally prays with impurity on his body. Is him doing wudu for each salah a clear indication that he’s NOT rejecting the obligation of removing impurity on the body before salah?

Q: Is someone who prays 5 times a day consistently with proper wudhu but knowingly and intentionally prays with impurity on the body, clothes or prayer area rejecting the obligation of purification, would this person be considered a disbeliever and be in hell forever? 

Is this person performing wudhu for each salah clearly showing that he is NOT rejecting the obligation of purification?

Q: Given the spread and propagation of Interfaith and the Abrahamic Religion, what is the shar'i ruling on performing Salaah in a multi-faith prayer room? 

Multi-faith prayer rooms are now found at airports, petrol stations, malls, offices etc. Some multi-faith prayer rooms have the symbols for each religion, at together, displayed on the wall or door.

Q: Is salaat valid if performed with a small tear in one's trouser exposing a little bit of one's thigh? Does salaat performed in this condition have to be repeated?

Q: When reading say maybe 4 sunnats of Zuhr Salaah. Can one make multiple intentions, for example, intention for wudhu salaah as well. Or is multiple intentions only acceptable in nafl salaah? 

Q: I was travelling to Durban and stopped in Harrismith to make Zohr. On my was back I stopped again to make Zohr, and was told after I completed my salah that I was facing the wrong direction. I am not sure if the brother was correct, but do I need to repeat my salaah?