The correct answer is d) chrima
Answer:
you need to include the bottom portion, not enough info
Explanation:
First one because Common synthetic materials are nylon, acrylic, polyester, carbon fiber, rayon and spandex. Synthetic materials are made from chemicals and are usually based on polymers. They are stronger than natural and regenerated materials.
Ph= -log[h30]
Ph= -log[1.7x10^-4]
pH= 3.77
pH is acidic
For a p type of semiconductor we need a dopant which is from 13th group in periodic table
Al , B, Ga, In Tl
So the correct element will be In : Indium
The other elements belongs to 15th group and hence will give n type semiconductor
