Salaah

Q: During Salah, if one recited a particular Surah after Surah Al Fatiha in the first rak'ah (for example, one recited Surah Al Kauthar), and then in the second rak'ah, after reciting Surah Al Fatiha, one begins to recite Surah Al Kauthar and then realises that he has already recited this Surah in the first rak'ah, and so he immediately starts again by reciting a different Surah (for example, Surah Al Ikhlaas). Does this action require sajdah sahw, since he was reciting a particular Surah, then stopped, and started again by reciting a different Surah?

Q: If one is travelling in a plane and wants to read salah with another brother in jamaat, in the limited space at the back of the plane would it be permissible due to space being limited:

1. The imam stands directly in front of a single muqtadi?
2. The imam stands almost next to muqtadi, just a few centimetres in front (due to space restrictions the ideal of one foot behind the imam cannot work)?
3. The imam stands on the right of the muqtadi, muqtadi behind imam one foot length?

Q: I prayed asr or Dhuhr I think, and I think in 2nd rak'ah I said ayah of al Faatihah wrong but was not sure so I ignored it and on the third rak'aat I noticed it was probably wrong so I took the 3rd rak'aat as 2nd and finished like normal and then did 2 sujood sahw. Any thing wrong with this?

Q: I have a lot of years of umra Qadha to pray. I try to do as many as I can after each Salaah. My question is can I sit on a chair to pray even more when I get tired?

Q: In Salaah, I recited in my last rak'aat  "Ihdina siraatal mustaqeem". But when I tried to do the Qaf with kasra it was like kaaf and so I recited it again, but this time the ta in Al-Mustaqeem was not properly audible I think, but I moved my tongue to say it and I guess I now think the second time I recited it, it was acceptable - but at the time my mind was like blank, I thought of both carrying on and saying it again and as I was quite pressured because I did not want to remain silent without reciting anything I said it again for a third time, but now I wonder is my prayer invalid because both times when I recited after the initial mistake were acceptable, so is it like I made a purpose addition in my Salaah or am I excused?

Q: Can Hanafis in countries whose asr Salaah time is in accordance with the other three Mazhabs perform the Asr Salaah with the Jamaah without
re-performing it later when the Hanafi asr time is due?

Q: Is it permissible to speak about Deen to a fellow Muslim in the Masjid whilst Adhaan is going on?

Q: If a person led salaah intentionally without wudhu many years ago and now cannot tell each musalli because he does not know who they are
individually. How does one make up for this shameless act. The Fear of allah has entered him and it does not give him peace of mind until he knows that he is forgiven and he does not have to worry.

Q: Does repeating Surah Fatiha in the 3rd or 4th rakaat require sajdah sahw according to the other view in the Hanafi madhab that to read Surah Fatiha in the last two rakaats is also Waajib as this is relayed from al Hasan from Abu Hanifa and preferred by Hanafi ulama as Ibn al Humam and al Ayni.

Q: If one mistakenly recites the dua of tashahhud audibly in salaah, is one required to perform Sajdah Sahw?