Salaah

Q: When praying at home where you are certain that there is no najaasat on the floor, will it be ok to pray directly on the floor? Or is it still better to use a prayer rug?

Q: Can a person pray salaah while wearing their glasses?

Q: Is qaza namaz acceptable if the prayer was skipped on purpose due to laziness?

Q: If one clears their throat in salah due to excess phelgm, does wudu break? Heavenly ornaments says one can clear their throat if compelled to do so.

Q: About 2 months ago when I prayed Dhuhr in school, one girl changed the direction of the prayer and I prayed with her even though iI had severe doubts about if it was the right direction. I then found out that it wasn't the right direction but I didn't repeat the prayer. Should I redo the prayer? And is it as if I didn't pray? I had forgotten about this incident, it recently came to my mind, what should I do?

Q: The is a hadith which states the recitation of ayatul kursi after every fardh salah. I want to know does it mean immediatly after fardh or after sunnat?

Q: I would like to know if the salaah of a female is accepted if her ankle becomes exposed (because of the knee bending) while in jalsa position although the pants or aabyah is long enough when standing?

Q: A musaafir joined a muqeem imam in a 4 rakaat salaah. His wudhu broke, so he had to leave. So when he repeats the salaah must he read 2 rakaats qasr or should he perform full 4 rakaats?

Q: Please advice if a lady has a long dress or abaya on that is not see through must she still wear a pants underneath when praying namaaz?

Q: If in "Ihdeenas-Siratal-Mustaqeem", I recited dee with a daad mistakenly instead of daal does this invalidate the namaz? I don't know for sure if I done it, but it seems likely so should I repeat the namaz or is it an acceptable mistake? I didn't repeat it afterwards.