Zikr & Dua

Q: Is it permissible to do dhikr while being napaak?

Q: When should tasbeeh fatimi be read. After every salaah or at bed time?

Q: I would like to know, sometimes our duas are not accepted by Allah, we don't get solutions for our problems, even after doing lot of dua. Is there any particular method in asking for dua, or is it because of the sins performed in the past knowingly or unknowingly? I know nothing will happen to our wish, but still is there any particular thing to be done, so that our halal duas get accepted?

Q: I am a bit confused about doing zikr loudly. After fajr in my local masjid (Deobandi) people usually do zikr loudly, and also in some spiritual gatherings I have taken part in (Chisti tariqa, with a Deobandi Sheikh) we do zikr loudly in group (by saying "laillaha... illa Allah" and "Allhu"). However, I have now come across that Imam Abu Hanifa considered loud zikr to be a bida'. Can you please clarify the matter?

Q: What is the purpose/significance of durood Akbar (Allahumma Salli Ala muhamadin Sayyid ul mursaleen) as well as other Durwood found in the last pages of the smaller version of the quran.

Q: Can istikhara be made of behalf of another person? I was told that this is against the sunnah and not established in the Qur'an and Hadith.

Q: I have a question regarding the beautiful names of Allah, is it sunnah to recite them for the zikr of Allah while expecting some benefit? For example, "reciting ya Rahman 100 time after every compulsory prayer makes you so and so". If it is not right then please explain what is the proper way of worshiping with the beautiful names. Also if you can recommend a Hadith will be very nice too?

Q: Is recitation of Aaya e kareema in congregation allowed in Islam or is it biddah?

Q: Please can you tell me the full benefits of ayatul karima?

Q: I came across a durood called durood-e-faatih. I would like to know if it is authentic. From which hadeeth?