Conditions for the validity of Nikaah

Q: My question is regarding nikaah. A guy performs nikaah himself (without a mufti and wali) with a girl taking Allah as his witness. The girl accepts this nikaah. He says she is now his wife. What is the ruling on this?

Q: I want to know one married lady converted her religion from Christianity to Islam and now she is separated for the last two years from her husband. After converting to Islam, is her previous marriage valid?

Q: Please can you advise what the ruling will be if a Muslim female is to marry a Hindu male. The wedding will be conducted under the Hindu rites. Is it permissible for the her mahram to partake in the ceremony?

Q: What is the law regarding a Muslim lady getting married to a Christian man?

Q: I was married with a husband who had converted to Islam 7 years ago but our marriage lasted for 2 years and we separated due to misunderstandings even though not officially divorced because he doesn't want to. During our marriage he didn't want to pray or fast sometimes even saying he will pray when he is with my family. My question is: Was my marriage valid? Should I ask for a divorce and sit for iddat even if we separated 5 years ago?

Q:

1. If a woman is divorced while she was two months pregnant. During her iddat she makes nikaah with another person but refrains from having relationship with him till she delivers. Is this lawful?

2. What should a woman involved in such a problem do?

Q: If a man and a woman plan to get married just to satisfy their sexual need. Further more they have decided to get separated by divorce afterwards. Are they committing a sin?

Q: Is it better to mention the full name of a newly convert non Muslim in his nikaah in the audience even though he has got a non Muslim surname (family name) or one just has to mention his normal Muslim name (Yusuf or Ahmad etc) and leave out his surname?

Q: I married a Christian girl and conducted the Nikah myself - i.e. I got two non-Muslim witnesses, asked her if she accepted my proposal based on the Mahr I gave her, she accepted and I then read the Nikah Khutbah, and confirmed that I have accepted her as well in my Nikaah. First Question: Is my Nikaah Valid? Secondly - things did not work out and I have subsequently given her 3 Talaaqs telling her that I divorce her in front of two Muslim male witnesses. If she reverts from Christianity - can I remarry her (perform Nikah again) or not? (Does she first need to remarry someone else etc.)

Q: The girl I like was non Muslim. Now she is a Muslim. We both like each other for 4 years. Her parents are not Muslim they don't agree to the marriage and they dislike that she became a Muslim. Does she require her parents permission for marriage?