Clothing and Covering the Aurah

Q: Is it permissible to read namaaz with just a kurta and no pants and underwear underneath it?

Q: I visited a senior sheikh in Cape Town who qualified in Al Azhar Egypt. The sheikh asked me to stay the night at his house. We made fajr salaah at his house in his study. I gave the iqamah and the sheikh walked into the study and led the salaah as the imaam. Only the two of us were present. The room was dark and after we had completed the salaah the light was switched on and I then only realised that the respected sheik led the fajr salaah in his underpants and a pyjama top. I was taken aback and asked the sheikh if its correct to lead salaah whilst only wearing an underpants and no long pants. The sheikh answered abruptly by saying " are you greater than Imaam Shafee and do you know better than Imaam shafee" I want to know if this was correct to make salaah in an underpants and do I perform my fajr over again as he was the imaam.

Q: Is it proper to read Salaah wearing a kurta that has short sleeves?

Q: Is it impermissible to wear jeans during the namaz and also not to fold the jeans upto the heel?

Q: If you use clothing that has pictures with eyes and you cover it by wearing a jacket or jubbah, is your salaat valid?

Q: I read that using clothing with animate pictures are haram. Are we allowed to read salaah with a picture of an animal but it doesn't have the eyes drawn on it e.g. like a puma tracksuit pants?

Q:

1) If you pull up your pants to ensure that it remains above your ankles before going down for rukhu or sajda, does it break your salaat?

2) If your pants falls below your ankles while reading salaat, does it break your salaat?

3) If you perform salaat with your pants below the ankles, is your salaat valid?

4) what type of movements nullify salaat?

Q: If an imam recites the 1st 15 verses (i.e. 1st ruku) from (1-15) of Surah Maryam in his 1st rakaat of fajr salah and in his second rakat recites 25 verses (i.e 2nd ruku) from 16-40, is the salaah valid?

Q: Is it permissible to perform Salaah with a short-sleeve kurta?

Q: If a person does not have a topee but he has an American cap, should he perform the Salaah wearing the American cap or should he perform the Salaah without a topee?