Conditions for the validity of Salaah

Q: Until what time can you read your zuhr salaah?

Q: Is not covering the feet below the ankles for woman against sunnah? I have severe waswasa and I found out that except for Hanafi's, others consider the feet as awrah. Are my prayers invalid as I didn't cover it after knowing about the ruling. Why do Hanafi's not consider the feet as awrah. I feel scared that my namaz isn't valid. What should I do?

Q: Is salaah valid when one is performing salaah individually at home while wearing pyjamas or other night attire?

Q: Does the area starting from the chin need to be covered during salaah for women?

Q: If the dress or skirt of a Hanafi woman is above her ankles (i.e. the ankles and part of her shin are exposed), will her salaah be valid if she prays salaah after putting on socks to cover the exposed area?

Q: In my country, it is compulsory to use hand sanitizer before entering any shop for shopping, etc. All of the hand sanitizers have alcohol in it. What is the ruling regarding praying salaah, touching Quraan or eating after using it?

Q: Is it mandatory or necessary for women to wear something under the gown (like to wear a shalwar or pants under a night dress) in order to perform namaaz or can she read her namaaz just wearing the gown or night dress which covers the whole body up to the feet but nothing inside. Will her namaaz be valid?

Q: If a person prays while wearing a t-shirt that has depictions of creatures on it, is his prayer valid or should he repeat it?

Q: If a person prays with his t-shirt inserted in his pants, is his prayer valid or should he repeat it?

Q: I would like to confirm if the following is correct: 

1. Someone told me that when reading salaah, when facing the qibla, if you are a few degrees wrong then it is maaf.

2. If someone is reading salaah facing the wrong direction then you must turn them towards the right direction or tell them and they can turn to the right direction without breaking their salaah and their salaah will be accepted.