Polyvinyl chloride is used for drain pipes in plumbing ...

[Pineappleeh]

Polyvinyl chloride is used for drain pipes in plumbing applications. It has replaced traditional cast iron pipe for this purpose.
 
  The major advantage of PVC in replacing cast iron for this application (particularly if you are a plumber or homeowner) is that PVC A) is of lighter weight.
  B) is easier to handle and cut.
  C) is more resistant to corrosion.
  D) All of the above are advantages of PVC.

Question 2

An alpha helix contains
 
  A) intramolecular hydrogen bonding.
  B) intermolecular hydrogen bonding.
  C) ester formation within the chain.
  D) ether formation within the chain.

[DylanD1323]

Answer to Question 1

D

Answer to Question 2

A

[Pineappleeh]

Gracias!

[phuda]

Excellent