Tahaarat

Q: 

1. A person begins fasting in the state of janaabat. Regarding ghusl in this state, is the ghusl valid if the water does not reach the inside of the throat or the inside of the nose (i.e. these actions cannot be exaggerated out of fear of the fast breaking)? Will the ghusl be valid if the water did not reach deep into these areas? Or would the person make ghusl washing the nose and mouth as in wudhu and upon breaking the fast would the person then gargle the throat and wash the inside of the nose properly?
2. A person forgets that they are fasting, and thus gargles and washes the nose intensely so that water is accidentally swallowed. Is the fast broken, bearing in mind that the person forgot that s/he was fasting?

Q:

1. What is the ruling with regards to water in a bath tub. The moment one steps into a bath tub, is the water considered as maaul musta'mal, thus ghusl will not be valid with such water! Is this correct? 
2. Is it true that water should not be able to seep through ones mozas? Is it correct?
3. What is maaul musta'mal?

I would appreciate 5 references to each answer.

Q: Can one recite quraanic aayats of Dua like Aayatal Kursi for protection in the state of haidh or janaabat?

Q: Is it a bidah to make masah of the nape in wudhu?

Q: Is it necessary to remove surma and kaajal from the eyes when taking a ghusl?

Q: In  a country  where esha and fajr time does not exist in certain months like England UK, can a Mazoor person who has made wudhu for maghrib salaah pray esha and fajr with the wudhu which was made for maghrib salaah? 

Q: Mazoor person who has to do wudhu for each salaah, does he have to do  wudhu for maghrib  and esha salaah separately, when combining maghrib  and esha salaah in Muzdalifah  or making wudhu once for maghrib will suffice for both prayers maghrib and esha? 

Q: After mastrbuting is Ghusal is Wajib on boy or Girl?

Q: Is it khilaaf e sunnat to make miswaak in the musjid like the Arabs do prior to salaah to get seventy times more reward?

Q: Is spiderweb (cobweb) impure? If one notices some dreads of spiderweb after the has prayed on his face does he need repeat prayer ?