Answer:

1. He was an average student who enjoyed art and singing.However, when Louis was exposed to science as a teenager, he knew he had found his calling. In 1838, Louis went to college to become a science teacher.
2. He believed that putrefaction- spoiling of food and fermentation were chemical process caused by oxygen in the air.
3. He pre heated the wine to 50-60 degree Celsius which killed unwanted organisms, extended the life of wine and saved the French wine industry.
4. He helped in development of vaccine for anthrax, which was used successfully in sheep, goats and cows. Then, in 1885, while studying rabies, Pasteur tested his first human vaccine. Pasteur produced the vaccine by attenuating the virus in rabbits and subsequently harvesting it from their spinal cords.
5. The answer is in the pic that I've sent.
6. It had been recognized that only the quartz crystal as a whole, and not its constituent molecules, is asymmetrical. But Biot had also found a number of natural organic substances—oil of turpentine, camphor, sugar, tartaric acid—that were optically active in aqueous solutions or in the fluid state.