No The Henna ceremony is held a week or so before the actual wedding. During the ceremony, the hands and feet of the bride and her guests (and, in some communities, the groom as well) are decorated in intricate designs with henna, a red dye made from crushed henna leaves.
No. Henna is an Indian or Hinduism tradition. Mainly used for events.
Orthodox Jewish brides don't because of the laws of modesty, but the other branches allow it.
Anything formal and modest is probably appropriate.
White.
They're the same white wedding dresses all other brides wear, except that Orthodox Jewish brides only wear dresses that completely cover them up.
Yes, but in other countries, they wear colorful costumes. There is no religious Jewish Law about what a bride must wear and so a Jewish bride will typically wear the colors that a bride wears in the general area of heritage. Western Jews usually wear white. Yemenite Jews wear a myriad of colors and are bedecked from head to foot in jewels. Some Indian Jews wear red, etc.
At every Jewish wedding I've attended, the bride wore white.
It is when the bride and the brides' family put henna on their hands.
Yes, you will find Jewish brides wearing different colour wedding dresses just like brides from any other culture.
Orthodox Jewish brides don't wear two veils. The veil just has to be able to cover her face and hair during the ceremony, the same as most traditional wedding veils. Some Orthodox brides do wear a veil that's more opaque than normal though.
Anything that any other bride would have worn. In fact, Jewish brides around the world generally wear what other brides of the local country would wear. Religious Jewish brides, throughout the ages, have dressed especially modestly, with long sleeves, long skirt, and high neck. The veil should, for religious women, either be replaced with a hat after the glass is broken, or be a hat in itself.
There are lots of traditions and customs for Pakistani brides. One is the daubing of a tumeric paste on the brides face and hands prior to the wedding to bless her. Another is the application of henna patterns to the bride's hands.